chore: Switch from master to main, add dependabot

Author: Stephan Wentz

.github/dependabot.yml

@@ -0,0 +1,12 @@
+version: 2
+updates:
+  - commit-message:
+      include: "scope"
+      prefix: "ci"
+    directory: "/"
+    labels:
+      - "dependencies"
+    open-pull-requests-limit: 10
+    package-ecosystem: "github-actions"
+    schedule:
+      interval: "weekly"

.github/workflows/build.yml

@@ -6,7 +6,7 @@ on:
   pull_request:
   push:
     branches:
-      - "master"
+      - "main"
 
 jobs:
   tests:

composer.json

@@ -34,11 +34,6 @@
             "vendor/bin/phpcs --basepath=. --report=summary --report-file=phpcs.log --standard=BrainbitsCodingStandardTest `find tests/BrainbitsCodingStandardTest/input/* | sort`; diff -u tests/BrainbitsCodingStandardTest/expected_report.txt phpcs.log"
         ]
     },
-    "extra": {
-        "branch-alias": {
-            "dev-master": "8.0-dev"
-        }
-    },
     "config": {
         "allow-plugins": {
             "dealerdirect/phpcodesniffer-composer-installer": true