chore: Adding new versioning strategies

[ddixit14]

This PR adds two new versioning strategies:

• always-bump-minor : This VersioningStrategy always bumps the minor version
• always-bump-major: This VersioningStrategy always bumps the major version

[ddixit14]

Tested it locally on a google-cloud-java fork.
For always-bump-major, this is the major-bump-pr created.
For always-bump-minor, this is the minor-bump-pr created.

[ddixit14]

@chingor13 Need some insights to write new tests/make the tests pass.

[suztomo]

For the new strategy, follow the test cases already written for "always-bump-patch". (I hope the tests are there). Found:

~/release-please/test $ vim ./versioning-strategies/java.ts
...
  describe('with AlwaysBumpPatch', () => {
    describe('with breaking change', () => {
      it('can bump a major', async () => {
        const strategy = new JavaSnapshot(new AlwaysBumpPatch({}));
        const oldVersion = Version.parse('1.2.3-SNAPSHOT');
        const newVersion = await strategy.bump(oldVersion, breakingCommits);
        expect(newVersion.toString()).to.equal('1.2.3');
      });

      it('can bump a major on pre major for breaking change', async () => {
        const strategy = new JavaSnapshot(new AlwaysBumpPatch({}));
        const oldVersion = Version.parse('0.1.2-SNAPSHOT');
        const newVersion = await strategy.bump(oldVersion, breakingCommits);
        expect(newVersion.toString()).to.equal('0.1.2');
      });

      it('can bump a minor pre major for breaking change', async () => {
        const strategy = new JavaSnapshot(
          new AlwaysBumpPatch({bumpMinorPreMajor: true})
        );
        const oldVersion = Version.parse('0.1.2-SNAPSHOT');
        const newVersion = await strategy.bump(oldVersion, breakingCommits);
        expect(newVersion.toString()).to.equal('0.1.2');
      });
    });

test/cli.js is untouched. Flaky tests? Needs help from Jeff.

[chingor13]

Need some insights to write new tests/make the tests pass.

We use a snapshot of the CLI --help output to test the CLI help feature. Try running npm run test:snap which should rewrite the test snapshots.

[suztomo]

@ddixit14 Do you plan to add a test case in versioning-strategies/java.ts ?

[chingor13]

Yes, please add unit tests for the new versioning strategies even though they seem trivial.

Otherwise, LGTM.

[bcoe]

Tiny nit, this should be AlwaysBumpMinorStrategy, my bad because I copy pasted this.