Fix bin/rspec test failures and bin/rubocop lint issues

.github/workflows/ruby.yml

@@ -0,0 +1,29 @@
+name: Ruby CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby-version: ['2.7', '3.0', '3.2', '3.4']
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Ruby ${{ matrix.ruby-version }}
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby-version }}
+        bundler-cache: true
+
+    - name: Run tests
+      run: ./bin/rspec
+
+    - name: Run RuboCop
+      run: ./bin/rubocop --fail-level=error

.rubocop.yml

@@ -1,4 +1,4 @@
-require:
+plugins:
   - rubocop-rspec
 
 AllCops:

spec/fc_enrich/fake_client_spec.rb

@@ -15,7 +15,7 @@ module FcEnrich
 
     it 'works for /v3/person.enrich that do not exist' do
       data = subject.post("/v3/person.enrich", { email: "someone@mail.com" })
-      expect(data).to be_blank
+      expect(data).to be_nil
     end
 
     it 'works for /v3/company.enrich' do
@@ -25,7 +25,7 @@ module FcEnrich
 
     it 'works for /v3/company.enrich that do not exist' do
       data = subject.post("/v3/company.enrich", { domain: "someone.com" })
-      expect(data).to be_blank
+      expect(data).to be_nil
     end
 
     it 'allows to change folder' do