Issues with Crystal 0.20.3

[jonahgeorge]

in lib/db/src/db/database.cr:50: instantiating 'DB::Driver+#build_connection(DB::Database)'

        conn = @driver.build_connection(self).as(Connection)
                       ^~~~~~~~~~~~~~~~

in lib/pg/src/pg/driver.cr:3: instantiating 'PG::Connection:Class#new(DB::Database)'

    Connection.new(db)
               ^~~

instance variable '@connection' of PG::Connection must be PQ::Connection, not Nil

Error: instance variable '@connection' is initialized inside a begin-rescue, so it can potentially be left uninitialized if an exception is raised and rescued

[will]

This should be fixed in v0.13.1 thanks to #75