Add action to synchronize labels using a file.

.github/labels.yml

@@ -0,0 +1,27 @@
+- name: bug
+  description: Bugs or performance problems
+  color: CC0000
+- name: dependencies
+  description: Update of dependencies
+  color: 0366d6
+- name: feature
+  color: a4c6fb
+  description: New features
+- name: enhancement
+  description: Enhancement of existing functionality
+  color: 94a6eb
+- name: deprecated
+  description: Deprecating API
+  color: f4c21d
+- name: removed
+  description: Removing API
+  color: e4b21d
+- name: tests
+  description: Enhancement of tests
+  color: 30cc62
+- name: documentation
+  description: Enhancement of documentation
+  color: bfafea
+- name: internal
+  description: Internal changes without user or API impact
+  color: e6e6e6

.github/workflows/assign-pr.yml

@@ -1,4 +1,4 @@
-name: 'Auto Assign'
+name: 'Auto Assign PR'
 on:
   pull_request:
 

.github/workflows/sync-labels.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