update dev dependencies

package.json

@@ -54,8 +54,8 @@
     "visualization"
   ],
   "devDependencies": {
-    "@babel/core": "^7.10.5",
-    "@babel/preset-env": "^7.10.4",
+    "@babel/core": "^7.11.0",
+    "@babel/preset-env": "^7.11.0",
     "@babel/register": "^7.10.5",
     "babel-eslint": "^10.1.0",
     "babel-loader": "^8.1.0",
@@ -71,11 +71,11 @@
     "esdoc-ecmascript-proposal-plugin": "^1.0.0",
     "esdoc-integrate-test-plugin": "^1.0.0",
     "esdoc-standard-plugin": "^1.0.0",
-    "eslint": "^7.5.0",
+    "eslint": "^7.6.0",
     "htmlhint": "^0.14.1",
     "in-publish": "^2.0.1",
     "jasmine-core": "^3.6.0",
-    "karma": "^5.1.0",
+    "karma": "^5.1.1",
     "karma-chrome-launcher": "3.1.0",
     "karma-coverage": "^2.0.3",
     "karma-coveralls": "^2.1.0",
@@ -88,10 +88,10 @@
     "load-script": "^1.0.0",
     "pre-commit": "^1.2.2",
     "terser-webpack-plugin": "^3.0.8",
-    "webpack": "^4.44.0",
+    "webpack": "^4.44.1",
     "webpack-cli": "^3.3.12",
     "webpack-dev-server": "^3.11.0",
-    "webpack-merge": "^5.0.9"
+    "webpack-merge": "^5.1.0"
   },
   "homepage": "https://github.com/katspaugh/wavesurfer.js",
   "pre-commit": "lint-js-html",