Convert tests to ts and fix existing (#936)

* Add jest watch option to package.json

* convert promise-alex-spec to ts & add types

* convert ./api tests from JS to TS

* convert ./api tests from JS to TS pt. 2

* More convert tests from JS to TS

* rpc-provider convert tests from js to ts

* rpc-provider tests js => ts

* rpc-provider tests js => ts

* linting issues

* tslint fixes

* 101 => 68 typescript errors

* WIP

* connect() e2e tests

* more fixes

* Fix linting errors of new ERA tests after merge

* test for listeners in connect

* formatting

* getting there...

* re-add skips

* test refactoring & codeclimate fixes

* more fixed tests

* mock.body workaround

* Fixed wrong test description

* ApiPromiseInterface => Api

* ws polyfill / send

* bring back isZero() test

* .then().catch() => .catch()

* Removed leftover body

* Type ProviderInterface => Http

* Fixed polyfill tests

* trailing whitespce

* (mock.body as any)['test_body'] and Balance

* Fix autoconnect in WsProvider

* Fixed part of linting errors in ERA tests

* call unused const unsubscribe

* added ts-ignores for testing private properties/ methods of Provider

* Archive node test

* Fixed linting for ERA tests

* Further changes

* Update packages/rpc-provider/src/ws/polyfill.spec.ts

Co-Authored-By: Amaury Martiny <amaury.martiny@protonmail.com>

* relative paths for imports inside module & reordering of imports pt. 1

* relative paths for imports inside module & reordering of imports pt. 2

* added skip back to e2e transactions

* Fix some more tests in TS (#952)

* Fix some more tests in ts

* Add more constructor

* More typing in ./api

* .skip

* <SubmittableResult>'s

* .catch() -> return()

* Extrinsics tests

* Left TODO's for extrinsic e2e tests

* Workaround for failing Type Extrinsic tests

packages/type-jsonrpc/src/index.spec.ts

@@ -2,7 +2,7 @@
 // This software may be modified and distributed under the terms
 // of the Apache-2.0 license. See the LICENSE file for details.
 
-import interfaces from '.';
+import interfaces from './';
 
 describe('jsonrpc', () => {
   it('exports the available interfaces', () => {