fix: add cache on master

Author: conblem

.github/workflows/cache.yaml

@@ -0,0 +1,22 @@
+name: Cache
+on:
+  schedule:
+    - cron: '0 * * * *'
+jobs:
+  cache:
+    runs-on: ubuntu-latest
+    steps:
+      - run: |
+          SIZE=$(PAGER=cat gh api -H "Accept: application/vnd.github.v3+json" /repos/$REPO/actions/cache/usage -q ".active_caches_size_in_bytes")
+          echo ::set-output name=SIZE::$(bc <<< "scale=4; $SIZE / 1000000000")
+        id: size
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          REPO: ${{ github.repository }}
+      - uses: RubbaBoy/[email protected]
+        with:
+          NAME: Cache size
+          LABEL: 'Cache size'
+          STATUS: ${{ steps.size.outputs.SIZE }}
+          COLOR: 00EEFF
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}