Dependabot config update, add pre-commit CI. (#36)

Author: kattni

.github/dependabot.yml

@@ -5,16 +5,15 @@ multi-ecosystem-groups:
     schedule:
       # Check for updates on the first Sunday of every month, 8PM UTC
       interval: "cron"
-      cronjob: "0 20 * * sun#1"
-    assignees: ["housekeeping"]
+      cronjob: "0 20 * * sun#2"
 
 updates:
   - package-ecosystem: "github-actions"
     directory: "/"
     patterns: ["*"]
-    multi_ecosystem_group: "dependencies"
+    multi-ecosystem-group: "dependencies"
 
   - package-ecosystem: "pip"
     directory: "/"
     patterns: ["*"]
-    multi_ecosystem_group: "dependencies"
+    multi-ecosystem-group: "dependencies"

.github/workflows/ci.yml

@@ -0,0 +1,26 @@
+name: CI
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+  workflow_call:
+
+# Cancel active CI runs for a PR before starting another run
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+defaults:
+  run:
+    shell: bash  # https://github.com/beeware/briefcase/pull/912
+
+env:
+  FORCE_COLOR: "1"
+
+jobs:
+  pre-commit:
+    name: Pre-commit checks
+    uses: beeware/.github/.github/workflows/pre-commit-run.yml@main
+    with:
+      pre-commit-source: "--group pre-commit"

.pre-commit-config.yaml

@@ -13,4 +13,4 @@ repos:
     rev: v0.0.170
     hooks:
       - id: rumdl
-        args: [--force-exclude, --fix]
+        args: [--fix]