update dev dependencies

package.json

@@ -54,11 +54,11 @@
     "visualization"
   ],
   "devDependencies": {
-    "@babel/core": "^7.12.3",
-    "@babel/preset-env": "^7.12.1",
+    "@babel/core": "^7.12.7",
+    "@babel/preset-env": "^7.12.7",
     "@babel/register": "^7.12.1",
     "babel-eslint": "^10.1.0",
-    "babel-loader": "^8.1.0",
+    "babel-loader": "^8.2.1",
     "babel-plugin-add-module-exports": "^1.0.4",
     "babel-plugin-istanbul": "^6.0.0",
     "babel-plugin-transform-class-properties": "^6.24.1",
@@ -71,27 +71,27 @@
     "esdoc-ecmascript-proposal-plugin": "^1.0.0",
     "esdoc-integrate-test-plugin": "^1.0.0",
     "esdoc-standard-plugin": "^1.0.0",
-    "eslint": "^7.12.0",
-    "htmlhint": "^0.14.1",
+    "eslint": "^7.14.0",
+    "htmlhint": "^0.14.2",
     "in-publish": "^2.0.1",
     "jasmine-core": "^3.6.0",
     "karma": "^5.2.3",
     "karma-chrome-launcher": "3.1.0",
     "karma-coverage": "^2.0.3",
     "karma-coveralls": "^2.1.0",
-    "karma-firefox-launcher": "^2.0.0",
+    "karma-firefox-launcher": "^2.1.0",
     "karma-jasmine": "4.0.1",
     "karma-jasmine-matchers": "4.0.2",
     "karma-verbose-reporter": "0.0.6",
     "karma-webpack": "^4.0.2",
-    "lint-staged": "^10.5.0",
+    "lint-staged": "^10.5.1",
     "load-script": "^1.0.0",
     "pre-commit": "^1.2.2",
     "terser-webpack-plugin": "^4.2.2",
     "webpack": "^4.44.2",
     "webpack-cli": "^3.3.12",
     "webpack-dev-server": "^3.11.0",
-    "webpack-merge": "^5.2.0"
+    "webpack-merge": "^5.4.0"
   },
   "homepage": "https://wavesurfer-js.org",
   "pre-commit": "lint-js-html",