Add Close to the connection.DB interface

Close allows users to close the underlying connections, useful for cases, like tests, where one opens too many connections and does not need them to be long lived.

Support returning on insert mutli

v2.1.7

Merge pull request #64 from ShiftLeftSecurity/allow-returning-for-ins…

include complex function with static arguments

bug fixes, c.f. #59

Bring back GoTestingLogger

Now without typo

Fix all imports inside 2.x.x

Merge pull request #55 from ShiftLeftSecurity/chipaca/v2-is-v2

update all the imports to also be v2

Update go.mod

Go modules requires things to happen to understand a version is 2.x...
So it needs to be added to the path of the module even though it is right there in the path.

Support SetSQLWithArgs on conflict

db/chain: OnUpdate.SetSQLWithArgs to pass args on conflict (#53)

OnUpdate.SetSQLWithArgs to pass args on conflict

This enables building SQL that has things like

    ... ON CONFLICT ... DO UPDATE SET (foo) = (foo || $n)

which is nice.

Support placeholder escaping

v1.1.1

Merge pull request #52 from ShiftLeftSecurity/preetam/support-placeho…

Add new `SetSQLNoParens` method.

Merge pull request #50 from ShiftLeftSecurity/olof/fix/more-variants

Add variant to set SQL on updates without parens.

Bump `github.com/Wjackc/pgx` to `v4` API.

Following #49 there are some incompatible interface changes requiring a large bump, therefore the version 2 seems justified.