update dev dependencies

package.json

@@ -87,12 +87,12 @@
     "babel-plugin-add-module-exports": "^1.0.2",
     "babel-plugin-istanbul": "^6.0.0",
     "blueimp-file-upload": ">=9.28.0",
-    "browserslist": "^4.8.2",
+    "browserslist": "^4.8.3",
     "buddy.js": "^0.9.3",
     "colors": "^1.4.0",
     "copy-webpack-plugin": "^5.1.1",
-    "css-loader": "^3.4.0",
-    "date-fns": "^2.8.1",
+    "css-loader": "^3.4.2",
+    "date-fns": "^2.9.0",
     "eslint": "^6.8.0",
     "ffmpeg.js": "^3.1.9001",
     "file-loader": "^5.0.2",
@@ -111,9 +111,9 @@
     "karma-coveralls": "^2.1.0",
     "karma-detect-browsers": "^2.3.3",
     "karma-edge-launcher": "^0.4.2",
-    "karma-firefox-launcher": "^1.2.0",
+    "karma-firefox-launcher": "^1.3.0",
     "karma-host-environment": "^2.0.3",
-    "karma-jasmine": "^2.0.1",
+    "karma-jasmine": "^3.1.0",
     "karma-jasmine-matchers": "^4.0.2",
     "karma-safari-launcher": "^1.0.0",
     "karma-verbose-reporter": "0.0.6",
@@ -130,9 +130,9 @@
     "opus-recorder": ">=6.1.1",
     "recorderjs": "git+https://github.com/mattdiamond/Recorderjs.git",
     "rimraf": "^3.0.0",
-    "sass-loader": "^8.0.0",
+    "sass-loader": "^8.0.1",
     "style-loader": "^1.1.2",
-    "terser-webpack-plugin": "^2.3.1",
+    "terser-webpack-plugin": "^2.3.2",
     "ts-ebml": "^2.0.2",
     "tui-jsdoc-template": "^1.2.2",
     "url-loader": "^3.0.0",