build: github actions (#3)

- Updated depdendabot schedule to 17:00 UTC.
- Removed semantic.yml.
- Renamed go.yml to ci.yml.
- Added stale.yml to handle stale pull requests and issues.

Author: Taliesin Millhouse

.github/dependabot.yml

@@ -4,5 +4,5 @@ updates:
   directory: "/"
   schedule:
     interval: daily
-    time: "19:00"
+    time: "17:00"
   open-pull-requests-limit: 10

.github/semantic.yml

@@ -0,0 +1,21 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-go@v2
+        with:
+          go-version: ^1.15
+      - run: |
+          go get -v -t -d ./...
+      - run: |
+          go test -v ./...

.github/workflows/ci.yml

@@ -0,0 +1,24 @@
+name: Close stale issues and pull requests
+
+on:
+  schedule:
+    - cron: 0 0 * * *
+
+jobs:
+  stale:
+    name: Update stale issues and pull requests
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v3
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          stale-issue-message: This issue is stale because it has been open ${{ secrets.OPEN_DAYS }} days with no activity. Remove stale label or comment or this will be closed in ${{ secrets.STALE_DAYS }} days.
+          stale-pr-message: This pull request is stale because it has been open ${{ secrets.OPEN_DAYS }} days with no activity. Remove stale label or comment or this will be closed in ${{ secrets.STALE_DAYS }} days.
+          close-issue-message: This issue has been closed because it has been open for ${{ secrets.TOTAL_DAYS }} days with no activity.
+          close-pr-message: This pull request has been closed because it has been open for ${{ secrets.TOTAL_DAYS }} days with no activity.
+          stale-issue-label: stale-closing-soon
+          stale-pr-label: stale-closing-soon
+          close-issue-label: stale-closed
+          close-pr-label: stale-closed
+          days-before-stale: ${{ secrets.OPEN_DAYS }}
+          days-before-close: ${{ secrets.STALE_DAYS }}