Upgrade to GitHub-native Dependabot

.github/dependabot.yml

@@ -0,0 +1,52 @@
+version: 2
+updates:
+- package-ecosystem: npm
+  directory: "/"
+  schedule:
+    interval: weekly
+  open-pull-requests-limit: 10
+  ignore:
+  - dependency-name: typedoc
+    versions:
+    - 0.20.18
+    - 0.20.20
+    - 0.20.23
+    - 0.20.25
+    - 0.20.27
+    - 0.20.28
+    - 0.20.30
+    - 0.20.32
+    - 0.20.33
+    - 0.20.34
+    - 0.20.35
+  - dependency-name: y18n
+    versions:
+    - 4.0.1
+  - dependency-name: "@types/jest"
+    versions:
+    - 26.0.20
+    - 26.0.21
+  - dependency-name: ts-jest
+    versions:
+    - 26.4.4
+    - 26.5.0
+    - 26.5.1
+    - 26.5.2
+    - 26.5.3
+    - 26.5.4
+  - dependency-name: highlight.js
+    versions:
+    - 10.5.0
+    - 10.6.0
+    - 10.7.1
+  - dependency-name: nock
+    versions:
+    - 13.0.6
+    - 13.0.7
+    - 13.0.9
+  - dependency-name: lodash
+    versions:
+    - 4.17.20
+  - dependency-name: typescript
+    versions:
+    - 3.9.7