Upgrade to GitHub-native Dependabot

Author: dependabot-preview[bot]

.github/dependabot.yml

@@ -0,0 +1,57 @@
+version: 2
+updates:
+- package-ecosystem: npm
+  directory: "/"
+  schedule:
+    interval: daily
+  open-pull-requests-limit: 10
+  ignore:
+  - dependency-name: eslint
+    versions:
+    - 7.20.0
+    - 7.21.0
+    - 7.22.0
+    - 7.23.0
+    - 7.24.0
+  - dependency-name: "@babel/core"
+    versions:
+    - 7.12.17
+    - 7.13.1
+    - 7.13.10
+    - 7.13.13
+    - 7.13.14
+    - 7.13.15
+    - 7.13.8
+  - dependency-name: y18n
+    versions:
+    - 4.0.1
+    - 4.0.2
+  - dependency-name: "@babel/preset-env"
+    versions:
+    - 7.12.17
+    - 7.13.0
+    - 7.13.10
+    - 7.13.12
+    - 7.13.5
+    - 7.13.8
+    - 7.13.9
+  - dependency-name: socket.io-client
+    versions:
+    - 3.1.0
+    - 3.1.1
+    - 3.1.2
+    - 4.0.0
+  - dependency-name: rxjs
+    versions:
+    - 6.6.3
+    - 6.6.6
+  - dependency-name: html-webpack-plugin
+    versions:
+    - 4.5.1
+  - dependency-name: webpack-cli
+    versions:
+    - 4.4.0
+    - 4.5.0
+  - dependency-name: cross-env
+    versions:
+    - 7.0.3