Tables aliases handling improved

• #38 bug - Ignoring Multiple FROM tables when they prefixed by DATASET (reported by @rubensmussicury)
• #52 bug - Incorrect column names when table aliases are used (reported by @akku1506 and fixed in #58)
• #55 dependencies - Bump coverage from 5.2 to 5.2.1 (by @dependabot[bot])
• #56 dependencies - Bump pytest from 5.4.3 to 6.0.0 (by @dependabot[bot])
• #57 dependencies - Bump pytest from 6.0.0 to 6.0.1 (by @dependabot[bot])

Improved handling of queries with GROUP BY

SELECT s.cust_id,count(s.cust_id) FROM SH.sales s GROUP BY s.cust_id

This query was giving s.cust_id as a table name instead of SH.sales. This is now fixed by #54.

Support for database.schema.table notation

• #45 - get_query_tables: Add support for database.schema.table notation (thanks to @dylanhogg)
• #46 - installed dependabot that keeps dependencies up to date
• removed TravisCI integration
• automated PyPI publish on new release creation

sqlparse updated

• #30 - Improved handling of table aliases
• #39 - Support Python 3.x only
• #41 - handling of newlines in queries fixed (as reported in #37)
• #34 - Support for valid syntax for OUTER JOIN

The following bugs were solved by updating sqlparse dependency in #40:

• #31 - CTE makes get_query_tables() case-sensitive for SELECT
• #32 - CTE breaks INSERT INTO ... SELECT and DELETE FROM
• #33 - Add support for ALTER TABLE ... APPEND

v1.5.0

• #29 - get_query_tables: fix handling of "SELECT x ORDER BY y" queries
• use Semantic Versioning

v1.4

• #25 - Handle CAST() and CONVERT() functions
• #27 - Handle Apache Hive queries

v1.3

#17 - Add support for table schemas in get_query_tables()

v1.2

• #13 - get_query_columns: add support for INSERT queries
• #12 - handle empty query argument of get_query_tokens
• #19 - update dependencies
• #18 - get_query_tables() breaks on INSERT INTO ... SELECT
• #22 - move normalize_sql to sql-metadata

v1.1.0

• #10 - Introduce get_query_limit_and_offset()

v1.0.2

• #6 - Handle more complex SQL queries