ABI generation for NPM

[brickpop]

Adding an artifacts package for NPM.

• Automatically detects the source contracts
• Generates src/abi.ts importing the newly created JSON ABI files
• 4Kb compressed

$ npm publish --dry-run
npm notice
npm notice 📦  @aragon/[email protected]
npm notice Tarball Contents
npm notice 1.1kB README.md
npm notice 358B dist/abi.d.ts
npm notice 672B dist/abi.js
npm notice 3.0kB dist/abi/IMultisig.json
npm notice 1.9kB dist/abi/ListedCheckCondition.json
npm notice 35.0kB dist/abi/Multisig.json
npm notice 9.4kB dist/abi/MultisigSetup.json
npm notice 101B dist/addresses.json
npm notice 92B dist/index.d.ts
npm notice 904B dist/index.js
npm notice 550B package.json
npm notice Tarball Details
npm notice name: @aragon/multisig-plugin-artifacts
npm notice version: 1.3.0
npm notice filename: aragon-multisig-plugin-artifacts-1.3.0.tgz
npm notice package size: 4.3 kB
npm notice unpacked size: 53.0 kB
npm notice shasum: ab67043db98b4fe0cbc72bc9ad2a2e243d5ecec5
npm notice integrity: sha512-63QJAJofwgQtd[...]bH4Y0m1yxJczg==
npm notice total files: 11
npm notice
npm notice Publishing to https://registry.npmjs.org/ with tag latest and public access (dry-run)
+ @aragon/[email protected]

[Rekard0]

LGTM!