Added labels declaratively (#379)

Author: tvvignesh

.github/labels.yml

@@ -0,0 +1,39 @@
+- color: d73a4a
+  description: Something isn't working
+  name: bug
+- color: e5c420
+  description: ""
+  name: core
+- color: 0366d6
+  description: Pull requests that update a dependency file
+  name: dependencies
+- color: 0075ca
+  description: Improvements or additions to documentation
+  name: documentation
+- color: cfd3d7
+  description: This issue or pull request already exists
+  name: duplicate
+- color: a2eeef
+  description: New feature or request
+  name: enhancement
+- color: 7057ff
+  description: Good for newcomers
+  name: good first issue
+- color: "008672"
+  description: Extra attention is needed
+  name: help wanted
+- color: e4e669
+  description: This doesn't seem right
+  name: invalid
+- color: 50e087
+  description: ""
+  name: new-rule
+- color: d876e3
+  description: Further information is requested
+  name: question
+- color: f78ff0
+  description: ""
+  name: waiting-for-release
+- color: ffffff
+  description: This will not be worked on
+  name: wontfix

.github/workflows/github.yml

@@ -0,0 +1,18 @@
+name: Sync labels
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - .github/labels.yml
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: micnncim/action-label-syncer@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          manifest: .github/labels.yml
+          prune: false