fix: reduce package size by adding files array to package.json

[domharrington]

What's Changing

Before:

npm notice
npm notice 📦  [email protected]
npm notice === Tarball Contents ===
npm notice 6.1kB  .all-contributorsrc
npm notice 129B   .github/PULL_REQUEST_TEMPLATE.md
npm notice 492B   .github/workflows/ci.yaml
npm notice 37B    .prettierignore
npm notice 9.3kB  CHANGELOG.md
npm notice 1.5kB  LICENSE
npm notice 15.0kB README.md
npm notice 7.0kB  dist/gitlog.cjs.development.js
npm notice 19.0kB dist/gitlog.cjs.development.js.map
npm notice 2.9kB  dist/gitlog.cjs.production.min.js
npm notice 15.1kB dist/gitlog.cjs.production.min.js.map
npm notice 6.8kB  dist/gitlog.esm.js
npm notice 19.0kB dist/gitlog.esm.js.map
npm notice 4.7kB  dist/index.d.ts
npm notice 190B   dist/index.js
npm notice 336B   example/example.js
npm notice 1.4kB  package.json
npm notice 10.8kB src/index.ts
npm notice 1.7kB  test/create-repo.sh
npm notice 48B    test/delete-repo.sh
npm notice 9.8kB  test/gitlog.test.ts
npm notice 694B   tsconfig.json
npm notice === Tarball Details ===
npm notice name:          gitlog
npm notice version:       4.0.8
npm notice filename:      gitlog-4.0.8.tgz
npm notice package size:  26.7 kB
npm notice unpacked size: 132.2 kB
npm notice shasum:        23a24926458ed7a8d762dc1ee96e20b05216d65e
npm notice integrity:     sha512-pP85Mh1Mz3vue[...]3Dmewadw8Ro/g==
npm notice total files:   22
npm notice
gitlog-4.0.8.tgz

After:

npm notice
npm notice 📦  [email protected]
npm notice === Tarball Contents ===
npm notice 1.5kB  LICENSE
npm notice 15.0kB README.md
npm notice 7.0kB  dist/gitlog.cjs.development.js
npm notice 19.0kB dist/gitlog.cjs.development.js.map
npm notice 2.9kB  dist/gitlog.cjs.production.min.js
npm notice 15.1kB dist/gitlog.cjs.production.min.js.map
npm notice 6.8kB  dist/gitlog.esm.js
npm notice 19.0kB dist/gitlog.esm.js.map
npm notice 4.7kB  dist/index.d.ts
npm notice 190B   dist/index.js
npm notice 1.4kB  package.json
npm notice === Tarball Details ===
npm notice name:          gitlog
npm notice version:       4.0.8
npm notice filename:      gitlog-4.0.8.tgz
npm notice package size:  18.6 kB
npm notice unpacked size: 92.7 kB
npm notice shasum:        50b2cdd949c12dde92e09ba458b41fe578320307
npm notice integrity:     sha512-TXGm7onw4826N[...]b5Y5A5M6vRdtA==
npm notice total files:   11
npm notice
gitlog-4.0.8.tgz

Fixes: https://github.com/domharrington/node-gitlog/issues/93

Change Type

Indicate the type of change your pull request is:

• [ ] patch
• [x] minor
• [ ] major