BRE-115: Update version to 1.1.2 for hotfix release

Signed-off-by: Tyler Levine <[email protected]>

[BG-5259] Add BCH testnet network properties

Summary: The BCH testnet does not vary much from the BTC testnet, but the coin property needs to be updated to 'BCH'. This is what caused the SDK BCH transaction tests to fail.

Reviewers: kevin, arik, zacleids

Reviewed By: zacleids

Differential Revision: https://phabricator.bitgo.com/D8907