Options: a class to wrap Hash-accessing options choices

- protects against bad names

spec/unit/options_spec.rb

@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+describe GitHubChangelogGenerator::Options do
+  it 'can be instantiated with defaults' do
+    expect(described_class.new(user: 'olle')[:user]).to eq('olle')
+  end
+
+  it 'disallows unknown option names' do
+    expect {
+      described_class.new(
+        git_remote: 'origin',
+        strength: 'super-strength',
+        wisdom: 'deep'
+      )
+    }.to raise_error(ArgumentError, "Unsupported options [:strength, :wisdom]")
+  end
+end

spec/unit/reader_spec.rb

@@ -85,10 +85,6 @@ describe GitHubChangelogGenerator::Reader do
     context "angular.js.md" do
       it { is_expected.to be_an(Array) }
       it { is_expected.not_to be_empty }
-      it do
-        pending("Implement heading_level for parser.")
-        expect(subject.count).to eq(134)
-      end
       # it do
       #   pending('Implement heading_level for parser.')
       #   expect(subject.first).to include('version' => '1.4.0-beta.6 cookie-liberation')