Upgrade to GitHub-native Dependabot

.github/dependabot.yml

@@ -0,0 +1,61 @@
+version: 2
+updates:
+- package-ecosystem: npm
+  directory: "/"
+  schedule:
+    interval: daily
+  open-pull-requests-limit: 10
+  ignore:
+  - dependency-name: mini-css-extract-plugin
+    versions:
+    - 1.3.5
+    - 1.3.6
+    - 1.3.7
+    - 1.3.8
+    - 1.3.9
+    - 1.4.0
+    - 1.4.1
+    - 1.5.0
+  - dependency-name: css-loader
+    versions:
+    - 5.0.1
+    - 5.0.2
+    - 5.1.0
+    - 5.1.1
+    - 5.1.2
+    - 5.1.3
+    - 5.2.0
+    - 5.2.1
+  - dependency-name: y18n
+    versions:
+    - 4.0.2
+  - dependency-name: sinon
+    versions:
+    - 10.0.0
+    - 9.2.4
+  - dependency-name: bootstrap
+    versions:
+    - 4.6.0
+  - dependency-name: "@babel/plugin-proposal-nullish-coalescing-operator"
+    versions:
+    - 7.12.1
+    - 7.12.13
+    - 7.13.0
+    - 7.13.8
+  - dependency-name: webpack-cli
+    versions:
+    - 4.4.0
+    - 4.5.0
+  - dependency-name: webpack-merge
+    versions:
+    - 5.7.3
+  - dependency-name: xmldom
+    versions:
+    - 0.5.0
+  - dependency-name: urijs
+    versions:
+    - 1.19.4
+    - 1.19.6
+  - dependency-name: sass-loader
+    versions:
+    - 10.1.1