Now passes tablename to DBD::Pg::last_insert_id, not composed sequence name.
adapted Pg test for Teng > v0.14_01
Skip some tests with Pg which is not compatible with Pg.
Modify Mock Schema of Pg to pass tests
Use RaiseError in Pg to throw exception as expected
Add a testcase to check when primary key name is not 'id'
Merge branch 'fix/pg-last-insert-id-test' into fix/pg-last-insert-id
Test::PostgreSQL is renamed, so bump deps version
fix test case about following error.

DBD::Pg::st execute failed: ERROR:  operator does not exist: text + integer
LINE 1: UPDATE "mock_basic" SET "name" = name + 1 WHERE ("id" = $1)
                                              ^
Merge branch 'master' into fix/xt-postgres

Conflicts:
	xt/Utils/postgresql.pm
fix regression? see 596d190
add t/002_common/030_fast_insert.t
fix _last_insert_id for Pg
fix skip way to avoid suddenly test quiting in Pg testing
fix test

"last_insert_id doesn't work when explicitly inserting Serial id in Pg
adjust _last_insert_id in Pg
Merge branch 'fix/pg-last-insert-id' into fix/xt-postgres

Conflicts:
	lib/Teng.pm
	t/002_common/001_insert.t
Merge pull request #139 from Songmu/fix/xt-postgres

Fix/xt postgres