v0.7.0-alpha2

Bug Fixes:

• Fail for unknown args in ContextAndArgs.typed[T] (#1413)
• Fix verifyNondeterministic exception in coders (#1418)
• Fix BigQueryType on refined types (#1424)
• Fix mergeAccumulators crash (#1428)
• Set timestamp attribute in JobTest for PubSubIO (#1417)

Features:

• Upgrade to beam 2.7 (#1430)
• Bump tensorflow to 1.11.0 (#1432)
• Add PubSubIO batch size write params (#1433)
• Improve coders messages (#1454)
• Add coders (#1394)(#1440)(#1434)(#1427)(#1412)(#1401)(#1429)
• Add better support for parameterised queries in @BigQueryType.fromQuery (#1431)
• support PubsubMessage in PubsubIO (#1395)
• Register sys.props (#1404)(#1406)
• Make typed and default args parsing logic more test friendly (#1421)
• Sparse lookups (#1398)(#1354)(#1393)

Breaking Changes:

• Refactor bigquery client (#1439)
• Move all coders to scio-core and rename scio-coders-macros to scio-macros (#1438)