Squashed commit of the following:

commit f26ae8edff3c84c8426887bb55591fac7dacdc7b
Merge: 51d3244 498e8a5
Author: Lee Byron <[email protected]>
Date:   Fri Sep 29 11:49:20 2017 -0700

    Merge branch 'dtslint' of https://github.com/umidbekkarimov/immutable-js into umidbekkarimov-dtslint

commit 498e8a5
Author: Umidbek Karimov <[email protected]>
Date:   Fri Sep 29 18:39:02 2017 +0400

    refactor(ts-test): remove ignored ts version annotations.

commit b798a78
Author: Umidbek Karimov <[email protected]>
Date:   Fri Sep 29 18:38:02 2017 +0400

    refactor(ts-test): remove fixed `FIXME` tags.

commit 2c12827
Author: Umidbek Karimov <[email protected]>
Date:   Fri Sep 29 18:35:56 2017 +0400

    refactor: move `flow-types` back, add extra directory for ts tests.

commit be1f544
Merge: 18f426b 6384ea3
Author: Umidbek Karimov <[email protected]>
Date:   Fri Sep 29 17:26:06 2017 +0400

    Merge branch 'master' into dtslint

commit 18f426b
Author: Umidbek Karimov <[email protected]>
Date:   Sat Apr 1 20:32:38 2017 +0400

    Add test spec for `record` types.

commit 3ff6ef4
Author: Umidbek Karimov <[email protected]>
Date:   Sat Apr 1 19:45:56 2017 +0400

    Add tests for `Range`, `Repeat` and `Seq` types.

commit fceaa38
Author: Umidbek Karimov <[email protected]>
Date:   Sat Apr 1 19:37:34 2017 +0400

    Add tests for `Stack` types.

commit 2f4e28d
Author: Umidbek Karimov <[email protected]>
Date:   Sat Apr 1 19:27:40 2017 +0400

    Add tests for `Set` and `OrderedSet` types.

commit 568fa9a
Author: Umidbek Karimov <[email protected]>
Date:   Sat Apr 1 19:13:43 2017 +0400

    Add tests for `Map` and `OrderedMap` types.

commit 6b63cbc
Author: Umidbek Karimov <[email protected]>
Date:   Sat Apr 1 18:06:55 2017 +0400

    Extract `list` and `exports` type tests from `immutable-flow.ts`.

commit 4dc8ec5
Author: Umidbek Karimov <[email protected]>
Date:   Sat Apr 1 15:55:37 2017 +0400

    Hide failed tests.

commit 211b7ae
Author: Umidbek Karimov <[email protected]>
Date:   Sat Apr 1 13:38:39 2017 +0400

    [WIP] Implement dtslint.

…ings

* facebook/master: (48 commits)
  4.0.0-rc.3
  Use latest immutable.js build on website
  Only build docs on tagged releases (immutable-js#1321)
  Relicense as MIT (immutable-js#1320)
  Fix rendering issue on tall screens
  Merge immutable-js#1285
  Do not throw from hasIn (immutable-js#1319)
  Add more flow tests for Records
  Upgrade prettier and jest (immutable-js#1318)
  Merge immutable-js#1193
  Minor flow record fixes
  Merges immutable-js#1195
  fixed immutable-js#1290 by removing relative position from star count (immutable-js#1317)
  Fix deploy script
  Adds a script which automatically builds a #npm branch (immutable-js#1316)
  Use .github directory
  Merges immutable-js#1314
  Flow config ignore all node_modules
  Update to latest version of flow (immutable-js#1312)
  fixed immutable-js#1313 by fixing two borked reducers (immutable-js#1315)
  ...