Pg-transparent-alter-table

- add --partial-mode for alter part of partitioned table
- add --version
- add help to arguments
- remove pg-export from dependencies

- Add support "using" expration in alter column type
- Fix: lost comment on column (2)
- Fix: not stop when fk validation fails, just print error and comand (3)

- Add key --dry-run for test run without execute any changing query
- Rename key --show-queries to --echo-queries (like psql, pg_export)
- Add key --copy-progress-interval for set interval between log copying stat lines (was hardcode to 60 sec before)

- transform transparent_alter_type to transparent_alter_table
- add support command: alter table .. move column .. before/after ..