Update to pgtype v1.9.1

Author: jackc

go.mod

@@ -10,7 +10,7 @@ require (
 	github.com/jackc/pgconn v1.10.1
 	github.com/jackc/pgio v1.0.0
 	github.com/jackc/pgproto3/v2 v2.2.0
-	github.com/jackc/pgtype v1.9.0
+	github.com/jackc/pgtype v1.9.1
 	github.com/jackc/puddle v1.2.0
 	github.com/rs/zerolog v1.15.0
 	github.com/shopspring/decimal v1.2.0

go.sum

@@ -63,6 +63,8 @@ github.com/jackc/pgtype v1.8.1 h1:9k0IXtdJXHJbyAWQgbWr1lU+MEhPXZz6RIXxfR5oxXs=
 github.com/jackc/pgtype v1.8.1/go.mod h1:LUMuVrfsFfdKGLw+AFFVv6KtHOFMwRgDDzBt76IqCA4=
 github.com/jackc/pgtype v1.9.0 h1:/SH1RxEtltvJgsDqp3TbiTFApD3mey3iygpuEGeuBXk=
 github.com/jackc/pgtype v1.9.0/go.mod h1:LUMuVrfsFfdKGLw+AFFVv6KtHOFMwRgDDzBt76IqCA4=
+github.com/jackc/pgtype v1.9.1 h1:MJc2s0MFS8C3ok1wQTdQxWuXQcB6+HwAm5x1CzW7mf0=
+github.com/jackc/pgtype v1.9.1/go.mod h1:LUMuVrfsFfdKGLw+AFFVv6KtHOFMwRgDDzBt76IqCA4=
 github.com/jackc/pgx/v4 v4.0.0-20190420224344-cc3461e65d96/go.mod h1:mdxmSJJuR08CZQyj1PVQBHy9XOp5p8/SHH6a0psbY9Y=
 github.com/jackc/pgx/v4 v4.0.0-20190421002000-1b8f0016e912/go.mod h1:no/Y67Jkk/9WuGR0JG/JseM9irFbnEPbuWV2EELPNuM=
 github.com/jackc/pgx/v4 v4.0.0-pre1.0.20190824185557-6972a5742186/go.mod h1:X+GQnOEnf1dqHGpw7JmHqHc1NxDoalibchSk9/RWuDc=