Bump github.com/jackc/pgx/v4 from 4.1.2 to 4.18.2

Bumps [github.com/jackc/pgx/v4](https://github.com/jackc/pgx) from 4.1.2 to 4.18.2.
- [Changelog](https://github.com/jackc/pgx/blob/v4.18.2/CHANGELOG.md)
- [Commits](jackc/pgx@v4.1.2...v4.18.2)

---
updated-dependencies:
- dependency-name: github.com/jackc/pgx/v4
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -7,8 +7,8 @@ require (
 	github.com/getkin/kin-openapi v0.2.0
 	github.com/gorilla/handlers v1.4.2
 	github.com/gorilla/mux v1.7.3
-	github.com/jackc/pgtype v1.0.2
-	github.com/jackc/pgx/v4 v4.1.2
+	github.com/jackc/pgtype v1.14.0
+	github.com/jackc/pgx/v4 v4.18.2
 	github.com/pborman/getopt v0.0.0-20190409184431-ee0cd42419d3
 	github.com/sirupsen/logrus v1.7.0
 	github.com/spf13/viper v1.6.1