merge nwilliams: Bump version to 1.0.6
merge nwilliams: Bump version to 1.0.6

https://code.launchpad.net/~akiban-technologies/akiban-sql-parser/1.0.6-update/+merge/121241
puneetjaiswal/sql-parser,fivetran/sql-parser,rimig/sql-parser,gnubila-france/sql-parser,fengshao0907/sql-parser,storyeah/sql-parser,mattyb149/sql-parser,brosander/sql-parser,puneetjaiswal/sql-parser,brosander/sql-parser,xiexingguang/sql-parser,storyeah/sql-parser,hudak/sql-parser,cswaroop/sql-parser