Update and rename blank.yml to pr_check.yml

Author: koji-1009

.github/workflows/pr_check.yml

@@ -0,0 +1,32 @@
+name: CI
+
+on:
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  danger:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: Setup Ruby for use with actions
+        uses: actions/[email protected]
+        with:
+          ruby-version: '2.6'
+          architecture: 'x64'
+      - name: Install danger
+        run: |
+          gem install bundler
+          bundle install
+      - name: Run danger
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: danger
+  unit_test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: Run unit test
+        run: ./gradlew studyplus-android-sdk:test
+

Gemfile

@@ -1,8 +1,4 @@
-# frozen_string_literal: true
-
 source "https://rubygems.org"
 
-git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
-
 gem "danger"
-gem 'danger-android_lint'
+gem 'danger-android_lint'