* development: (164 commits)
Remove old tests
Remove unused code
Fix tests
Remove redundant spaces
Don't store empty objects
Fix a typo
Remove duplicate operations
Remove redundant instance variables
Fix tests
Remove blockStore and default to numConfirmations === 0
Add a comment
Store number of confirmations in a blockStore
Remove tautology check
Pass blockStore to eventWatcher
Fix last merge conflicts
Clear cache on unsubscribe
Clear store cache on events
Add more configs for order watcher
Make subscribe function async and make blockStore operational
Adjust tests to new interface
...
# Conflicts:
# package.json
# src/types.ts
# yarn.lock
* 'orderWatcher' of github.com:0xProject/0x.js: (33 commits)
Remove old tests
Remove unused code
Fix tests
Remove redundant spaces
Don't store empty objects
Fix a typo
Remove duplicate operations
Remove redundant instance variables
Fix tests
Remove blockStore and default to numConfirmations === 0
Add a comment
Store number of confirmations in a blockStore
Remove tautology check
Pass blockStore to eventWatcher
Fix last merge conflicts
Clear cache on unsubscribe
Clear store cache on events
Add more configs for order watcher
Make subscribe function async and make blockStore operational
Adjust tests to new interface
...
* development:
0.23.0
Update CHANGELOG
Fix amounts in tests one last time. Now that we updated the testRPC snapshot, this should no longer be mismatched between CI and locally
Update testRPC snapshot used by CircleCi
Push unsubscribe to the base class rather than super
Check for null rather than undefined
Removed nits
Test case was error then unsubscribe
Clean up subscription state.
Fix unhandled promise rejection error on subscriptions
# Conflicts:
# src/types.ts
# test/exchange_wrapper_test.ts
# test/token_wrapper_test.ts
