diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 62d4c053..e708b1c0 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 601a2905..734126e9 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,5 @@
-distributionSha256Sum = c9910513d0eed63cd8f5c7fec4cb4a05731144770104a0871234a4edc3ba3cef
-distributionUrl       = https\://services.gradle.org/distributions/gradle-6.5-all.zip
-distributionBase      = GRADLE_USER_HOME
-distributionPath      = wrapper/dists
-zipStoreBase          = GRADLE_USER_HOME
-zipStorePath          = wrapper/dists
+distributionBase = GRADLE_USER_HOME
+distributionPath = wrapper/dists
+distributionUrl  = https\://services.gradle.org/distributions/gradle-6.7.1-all.zip
+zipStoreBase     = GRADLE_USER_HOME
+zipStorePath     = wrapper/dists
diff --git a/gradlew b/gradlew
index 8f890474..4f906e0c 100755
--- a/gradlew
+++ b/gradlew
@@ -26,22 +26,22 @@
 # Resolve links: $0 may be a link
 PRG="$0"
 # Need this for relative symlinks.
-while [ -h "$PRG" ]; do
-  ls=$(ls -ld "$PRG")
-  link=$(expr "$ls" : '.*-> \(.*\)$')
-  if expr "$link" : '/.*' >/dev/null; then
-    PRG="$link"
-  else
-    PRG=$(dirname "$PRG")"/$link"
-  fi
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
 done
-SAVED="$(pwd)"
-cd "$(dirname \"$PRG\")/" >/dev/null
-APP_HOME="$(pwd -P)"
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
 cd "$SAVED" >/dev/null
 
 APP_NAME="Gradle"
-APP_BASE_NAME=$(basename "$0")
+APP_BASE_NAME=`basename "$0"`
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
@@ -49,15 +49,15 @@ DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
 
-warn() {
-  echo "$*"
+warn () {
+    echo "$*"
 }
 
-die() {
-  echo
-  echo "$*"
-  echo
-  exit 1
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
 }
 
 # OS specific support (must be 'true' or 'false').
@@ -65,118 +65,119 @@ cygwin=false
 msys=false
 darwin=false
 nonstop=false
-case "$(uname)" in
-CYGWIN*)
-  cygwin=true
-  ;;
-Darwin*)
-  darwin=true
-  ;;
-MINGW*)
-  msys=true
-  ;;
-NONSTOP*)
-  nonstop=true
-  ;;
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
 esac
 
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
+
 # Determine the Java command to use to start the JVM.
-if [ -n "$JAVA_HOME" ]; then
-  if [ -x "$JAVA_HOME/jre/sh/java" ]; then
-    # IBM's JDK on AIX uses strange locations for the executables
-    JAVACMD="$JAVA_HOME/jre/sh/java"
-  else
-    JAVACMD="$JAVA_HOME/bin/java"
-  fi
-  if [ ! -x "$JAVACMD" ]; then
-    die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
 
 Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
-  fi
+    fi
 else
-  JAVACMD="java"
-  which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
 
 Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
 fi
 
 # Increase the maximum file descriptors if we can.
-if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ]; then
-  MAX_FD_LIMIT=$(ulimit -H -n)
-  if [ $? -eq 0 ]; then
-    if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ]; then
-      MAX_FD="$MAX_FD_LIMIT"
-    fi
-    ulimit -n $MAX_FD
-    if [ $? -ne 0 ]; then
-      warn "Could not set maximum file descriptor limit: $MAX_FD"
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
     fi
-  else
-    warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
-  fi
 fi
 
 # For Darwin, add options to specify how the application appears in the dock
 if $darwin; then
-  GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
 fi
 
 # For Cygwin or MSYS, switch paths to Windows format before running java
-if [ "$cygwin" = "true" -o "$msys" = "true" ]; then
-  APP_HOME=$(cygpath --path --mixed "$APP_HOME")
-  CLASSPATH=$(cygpath --path --mixed "$CLASSPATH")
-
-  JAVACMD=$(cygpath --unix "$JAVACMD")
-
-  # We build the pattern for arguments to be converted via cygpath
-  ROOTDIRSRAW=$(find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null)
-  SEP=""
-  for dir in $ROOTDIRSRAW; do
-    ROOTDIRS="$ROOTDIRS$SEP$dir"
-    SEP="|"
-  done
-  OURCYGPATTERN="(^($ROOTDIRS))"
-  # Add a user-defined pattern to the cygpath arguments
-  if [ "$GRADLE_CYGPATTERN" != "" ]; then
-    OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
-  fi
-  # Now convert the arguments - kludge to limit ourselves to /bin/sh
-  i=0
-  for arg in "$@"; do
-    CHECK=$(echo "$arg" | egrep -c "$OURCYGPATTERN" -)
-    CHECK2=$(echo "$arg" | egrep -c "^-") ### Determine if an option
-
-    if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ]; then ### Added a condition
-      eval $(echo args$i)=$(cygpath --path --ignore --mixed "$arg")
-    else
-      eval $(echo args$i)="\"$arg\""
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
     fi
-    i=$(expr $i + 1)
-  done
-  case $i in
-  0) set -- ;;
-  1) set -- "$args0" ;;
-  2) set -- "$args0" "$args1" ;;
-  3) set -- "$args0" "$args1" "$args2" ;;
-  4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-  5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-  6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-  7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-  8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-  9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
-  esac
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
 fi
 
 # Escape application args
-save() {
-  for i; do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/"; done
-  echo " "
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
 }
-APP_ARGS=$(save "$@")
+APP_ARGS=`save "$@"`
 
 # Collect all arguments for the java command, following the shell quoting and substitution rules
 eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
diff --git a/gradlew.bat b/gradlew.bat
index 5093609d..107acd32 100644
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -40,7 +40,7 @@ if defined JAVA_HOME goto findJavaFromJavaHome
 
 set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto init
+if "%ERRORLEVEL%" == "0" goto execute
 
 echo.
 echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
@@ -54,7 +54,7 @@ goto fail
 set JAVA_HOME=%JAVA_HOME:"=%
 set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 
-if exist "%JAVA_EXE%" goto init
+if exist "%JAVA_EXE%" goto execute
 
 echo.
 echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
@@ -64,21 +64,6 @@ echo location of your Java installation.
 
 goto fail
 
-:init
-@rem Get command-line arguments, handling Windows variants
-
-if not "%OS%" == "Windows_NT" goto win9xME_args
-
-:win9xME_args
-@rem Slurp the command line arguments.
-set CMD_LINE_ARGS=
-set _SKIP=2
-
-:win9xME_args_slurp
-if "x%~1" == "x" goto execute
-
-set CMD_LINE_ARGS=%*
-
 :execute
 @rem Setup the command line
 
@@ -86,7 +71,7 @@ set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 
 
 @rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
 
 :end
 @rem End local scope for the variables with windows NT shell