William Chargin ad0e98ac2c
Add createRelativeHistory history implementation (#666)
Summary:
See #643 and the module docstring on `createRelativeHistory.js` for
context and explanation.

This patch adds `history@^3.0.0` as an explicit dependency—previously,
we were depending on it only implicitly through `react-router` (which
was fine then, but is not now). The dependency is chosen to match the
version specified in `react-router`’s `package.json`.

Test Plan:
Extensive unit tests included, with full coverage; `yarn test` suffices.

wchargin-branch: createRelativeHistory
2018-08-15 12:01:27 -07:00
..
2018-08-10 19:44:02 -07:00
2018-08-15 11:58:12 -07:00