Publish new releases by GitHub Actions (#78)

* build: adds release action

* build: bump to 1.9.0

.github/workflows/release.yml

@@ -0,0 +1,24 @@
+---
+on:
+  workflow_dispatch:
+
+jobs:
+  push:
+    name: Push gem to RubyGems.org
+    runs-on: ubuntu-latest
+
+    permissions:
+      id-token: write # IMPORTANT: this permission is mandatory for trusted publishing
+      contents: write # IMPORTANT: this permission is required for `rake release` to push the release tag
+
+    steps:
+      # Set up
+      - uses: actions/checkout@v4
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true
+          ruby-version: ruby
+
+      # Release
+      - uses: rubygems/release-gem@v1

lib/capybara/screenshot/diff/version.rb

@@ -3,7 +3,7 @@
 module Capybara
   module Screenshot
     module Diff
-      VERSION = "1.8.3"
+      VERSION = "1.9.0"
     end
   end
 end