package.json: specify the folders to include

[XhmikosR]

Before:

C:\Users\xmr\Desktop\ua-parser-js>npm pack --dry
npm notice
npm notice package: [email protected]
npm notice === Tarball Contents ===
npm notice 640B    .github/FUNDING.yml
npm notice 330B    .github/workflows/run-test.yml
npm notice 22B     .jshintrc
npm notice 194B    .travis.yml
npm notice 282B    bower.json
npm notice 41B     changelog.md
npm notice 43B     dist/ua-parser.html
npm notice 19.7kB  dist/ua-parser.min.js
npm notice 15.4kB  dist/ua-parser.pack.js
npm notice 1.1kB   license.md
npm notice 329B    package.js
npm notice 7.5kB   package.json
npm notice 11.9kB  readme.md
npm notice 100B    security.md
npm notice 44.3kB  src/ua-parser.js
npm notice 48.7kB  test/browser-test.json
npm notice 6.2kB   test/cpu-test.json
npm notice 104.9kB test/device-test.json
npm notice 4.8kB   test/engine-test.json
npm notice 14.3kB  test/mediaplayer-test.json
npm notice 33.7kB  test/os-test.json
npm notice 14.0kB  test/test.js
npm notice === Tarball Details ===
npm notice name:          ua-parser-js
npm notice version:       0.7.31
npm notice filename:      ua-parser-js-0.7.31.tgz
npm notice package size:  59.2 kB
npm notice unpacked size: 328.4 kB
npm notice shasum:        a214bba4ec6408e9be3e662d07b39e258f447b35
npm notice integrity:     sha512-e36FwyLlWHxNd[...]3F5yqYaKzJh2g==
npm notice total files:   22

After:

C:\Users\xmr\Desktop\ua-parser-js>npm pack --dry
npm notice
npm notice package: [email protected]
npm notice === Tarball Contents ===
npm notice 43B    dist/ua-parser.html
npm notice 19.7kB dist/ua-parser.min.js
npm notice 15.4kB dist/ua-parser.pack.js
npm notice 1.1kB  license.md
npm notice 7.5kB  package.json
npm notice 11.9kB readme.md
npm notice 44.3kB src/ua-parser.js
npm notice === Tarball Details ===
npm notice name:          ua-parser-js
npm notice version:       0.7.31
npm notice filename:      ua-parser-js-0.7.31.tgz
npm notice package size:  26.9 kB
npm notice unpacked size: 99.9 kB
npm notice shasum:        4fd0da3edec9d182e11e5013c0888a377dae171a
npm notice integrity:     sha512-w9QpHBEfm2q1a[...]wJk6Z+ziAXUcA==
npm notice total files:   7

@faisalman You could even be more explicit, but this should do the job for now :)

[XhmikosR]

@faisalman friendly ping :)