Upgrade dependencies

package.json

@@ -24,12 +24,12 @@
   "homepage": "https://github.com/syzoj/syzoj#readme",
   "dependencies": {
     "amqplib": "^0.5.2",
-    "ansi-to-html": "^0.6.9",
+    "ansi-to-html": "^0.6.10",
-    "async-lock": "^1.1.3",
+    "async-lock": "^1.2.0",
     "body-parser": "^1.15.2",
     "cheerio": "^1.0.0-rc.1",
-    "command-line-args": "^5.0.2",
+    "command-line-args": "^5.1.0",
-    "cookie-parser": "^1.4.3",
+    "cookie-parser": "^1.4.4",
     "cssfilter": "0.0.10",
     "download": "^7.1.0",
     "ejs": "^2.5.2",
@@ -39,11 +39,11 @@
     "fs-extra": "^7.0.1",
     "gravatar": "^1.8.0",
     "javascript-time-ago": "^1.0.30",
-    "js-yaml": "^3.9.0",
+    "js-yaml": "^3.13.0",
     "jsdom": "^14.0.0",
     "jsondiffpatch": "0.2.5",
-    "jsonwebtoken": "^8.4.0",
+    "jsonwebtoken": "^8.5.1",
-    "mariadb": "^2.0.2-rc",
+    "mariadb": "^2.0.3",
     "moment": "^2.24.0",
     "msgpack-lite": "^0.1.26",
     "multer": "^1.2.0",
@@ -54,19 +54,19 @@
     "randomstring": "^1.1.5",
     "redis": "^2.8.0",
     "request": "^2.74.0",
-    "request-promise": "^4.1.1",
+    "request-promise": "^4.2.4",
     "sendmail": "^1.1.1",
-    "sequelize": "^5.0.0-beta.15",
+    "sequelize": "^5.1.1",
     "serialize-javascript": "^1.6.1",
     "session-file-store": "^1.0.0",
     "socket.io": "^2.2.0",
-    "stream-to-string": "^1.1.0",
+    "stream-to-string": "^1.2.0",
     "syzoj-divine": "^1.0.2",
     "syzoj-renderer": "^1.0.3",
     "tempfile": "^2.0.0",
     "tmp-promise": "^1.0.3",
     "waliyun": "^3.1.1",
-    "winston": "^3.1.0",
+    "winston": "^3.2.1",
-    "xss": "^1.0.3"
+    "xss": "^1.0.6"
   }
 }