Bump github.com/jackc/pgx/v4 from 4.1.2 to 4.2.1

Bumps [github.com/jackc/pgx/v4](https://github.com/jackc/pgx) from 4.1.2 to 4.2.1.
- [Release notes](https://github.com/jackc/pgx/releases)
- [Changelog](https://github.com/jackc/pgx/blob/master/CHANGELOG.md)
- [Commits](jackc/pgx@v4.1.2...v4.2.1)

Signed-off-by: dependabot-preview[bot] <[email protected]>

go.mod

@@ -5,7 +5,7 @@ go 1.13
 require (
 	github.com/go-kit/kit v0.9.0
 	github.com/jackc/pgtype v1.0.3 // indirect
-	github.com/jackc/pgx/v4 v4.1.2
+	github.com/jackc/pgx/v4 v4.2.1
 	github.com/lib/pq v1.3.0 // indirect
 	github.com/pkg/errors v0.8.1
 	github.com/prometheus/client_golang v1.3.0

go.sum

@@ -51,6 +51,8 @@ github.com/jackc/pgconn v0.0.0-20190824142844-760dd75542eb/go.mod h1:lLjNuW/+OfW
 github.com/jackc/pgconn v0.0.0-20190831204454-2fabfa3c18b7/go.mod h1:ZJKsE/KZfsUgOEh9hBm+xYTstcNHg7UPMVJqRfQxq4s=
 github.com/jackc/pgconn v1.1.0 h1:10i6DMVJOSko/sD3FLpFKBHONzDGKkX8pbLyHC8B92o=
 github.com/jackc/pgconn v1.1.0/go.mod h1:GgY/Lbj1VonNaVdNUHs9AwWom3yP2eymFQ1C8z9r/Lk=
+github.com/jackc/pgconn v1.2.1 h1:+73KD6pbtv6Dbs6/rqlSRUa8XffPlW6YBd1hyFLpwuA=
+github.com/jackc/pgconn v1.2.1/go.mod h1:GgY/Lbj1VonNaVdNUHs9AwWom3yP2eymFQ1C8z9r/Lk=
 github.com/jackc/pgio v1.0.0 h1:g12B9UwVnzGhueNavwioyEEpAmqMe1E/BN9ES+8ovkE=
 github.com/jackc/pgio v1.0.0/go.mod h1:oP+2QK2wFfUWgr+gxjoBH9KGBb31Eio69xUb0w5bYf8=
 github.com/jackc/pgmock v0.0.0-20190831213851-13a1b77aafa2 h1:JVX6jT/XfzNqIjye4717ITLaNwV9mWbJx0dLCpcRzdA=
@@ -72,11 +74,15 @@ github.com/jackc/pgtype v1.0.2 h1:TVyes5WLzcWjLUQ5C7WUQOZ/+yd+v7bCfKRd7XMP6Mk=
 github.com/jackc/pgtype v1.0.2/go.mod h1:5m2OfMh1wTK7x+Fk952IDmI4nw3nPrvtQdM0ZT4WpC0=
 github.com/jackc/pgtype v1.0.3 h1:sFfpUKhD2njyIFVEgNaZSKwMtPxYJi2spVP9iFY8E6w=
 github.com/jackc/pgtype v1.0.3/go.mod h1:5m2OfMh1wTK7x+Fk952IDmI4nw3nPrvtQdM0ZT4WpC0=
+github.com/jackc/pgtype v1.1.0 h1:aZwrtaSe314VgSGmKvggULa2TavoD1jWVsxj9Zdltek=
+github.com/jackc/pgtype v1.1.0/go.mod h1:5m2OfMh1wTK7x+Fk952IDmI4nw3nPrvtQdM0ZT4WpC0=
 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=
 github.com/jackc/pgx/v4 v4.1.2 h1:xZwqiD9cP6zF7oJ1NO2j9txtjpA7I+MdfP3h/TAT1Q8=
 github.com/jackc/pgx/v4 v4.1.2/go.mod h1:0cQ5ee0A6fEsg29vZekucSFk5OcWy8sT4qkhuPXHuIE=
+github.com/jackc/pgx/v4 v4.2.1 h1:ax8CUJktiYKcxp+QUVg+RzsrIEhOaUrpDhggVpTMm2g=
+github.com/jackc/pgx/v4 v4.2.1/go.mod h1:dEKjU2/cUpThaZpBvDrThcA0a3uqYS9uj53jcGa5j0U=
 github.com/jackc/puddle v0.0.0-20190413234325-e4ced69a3a2b/go.mod h1:m4B5Dj62Y0fbyuIc15OsIqK0+JU8nkqQjsgx7dvjSWk=
 github.com/jackc/puddle v0.0.0-20190608224051-11cab39313c9/go.mod h1:m4B5Dj62Y0fbyuIc15OsIqK0+JU8nkqQjsgx7dvjSWk=
 github.com/jackc/puddle v1.0.0/go.mod h1:m4B5Dj62Y0fbyuIc15OsIqK0+JU8nkqQjsgx7dvjSWk=