Clean up repo

[amaury1093]

• Bump all packages to 3.0.0
• All packages now require local packages. Which means when we modify one, all the other immediately know of the changes.
• added back the old api folder, because all tests pass there. That's most of the file changes in the file diff.
  • to run those tests: yarn test:api in root folder, or yarn test in api folder
• in api, only converted utils/ and format/ folder to TS (related Convert @parity/api to TypeScript #21)
• fix Metamask responses are not parsed #48 correctly

Edit: to test in real life: cd packages/light.js/example && yarn start, uses (almost) all packages, works with metamask and with local node.

[amaury1093]

added this, so that when people clone this repo and install, all the packages are built.

[coveralls]

Pull Request Test Coverage Report for Build 256

• 230 of 306 (75.16%) changed or added relevant lines in 15 files are covered.
• 5 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+22.5%) to 74.919%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
packages/api/src/util/encode.ts	4	5	80.0%
packages/light.js/src/rpc/utils/createRpc.ts	2	3	66.67%
packages/api/src/format/input.ts	45	53	84.91%
packages/api/src/format/output.ts	149	215	69.3%

Files with Coverage Reduction	New Missed Lines	%
packages/electron/src/getParityPath.ts	1	0.0%
packages/electron/src/fetchParity.ts	1	0.0%
packages/contracts/src/badgereg.ts	3	0.0%

Totals
Change from base Build 247:	22.5%
Covered Lines:	1335
Relevant Lines:	1791

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💛 - Coveralls

[axelchalon]

nice 👍