Remove PostgreSQL 11 from supported versions

.github/workflows/ci.yml

@@ -17,18 +17,8 @@ jobs:
     strategy:
       matrix:
         go-version: ["1.20", "1.21"]
-        pg-version: [11, 12, 13, 14, 15, 16, cockroachdb]
+        pg-version: [12, 13, 14, 15, 16, cockroachdb]
         include:
-          - pg-version: 11
-            pgx-test-database: "host=127.0.0.1 user=pgx_md5 password=secret dbname=pgx_test"
-            pgx-test-unix-socket-conn-string: "host=/var/run/postgresql dbname=pgx_test"
-            pgx-test-tcp-conn-string: "host=127.0.0.1 user=pgx_md5 password=secret dbname=pgx_test"
-            pgx-test-scram-password-conn-string: "host=127.0.0.1 user=pgx_scram password=secret dbname=pgx_test"
-            pgx-test-md5-password-conn-string: "host=127.0.0.1 user=pgx_md5 password=secret dbname=pgx_test"
-            pgx-test-plain-password-conn-string: "host=127.0.0.1 user=pgx_pw password=secret dbname=pgx_test"
-            pgx-test-tls-conn-string: "host=localhost user=pgx_ssl password=secret sslmode=verify-full sslrootcert=/tmp/ca.pem dbname=pgx_test"
-            pgx-ssl-password: certpw
-            pgx-test-tls-client-conn-string: "host=localhost user=pgx_sslcert sslmode=verify-full sslrootcert=/tmp/ca.pem sslcert=/tmp/pgx_sslcert.crt sslkey=/tmp/pgx_sslcert.key dbname=pgx_test"
           - pg-version: 12
             pgx-test-database: "host=127.0.0.1 user=pgx_md5 password=secret dbname=pgx_test"
             pgx-test-unix-socket-conn-string: "host=/var/run/postgresql dbname=pgx_test"

README.md

@@ -92,7 +92,7 @@ See the presentation at Golang Estonia, [PGX Top to Bottom](https://www.youtube.
 
 ## Supported Go and PostgreSQL Versions
 
-pgx supports the same versions of Go and PostgreSQL that are supported by their respective teams. For [Go](https://golang.org/doc/devel/release.html#policy) that is the two most recent major releases and for [PostgreSQL](https://www.postgresql.org/support/versioning/) the major releases in the last 5 years. This means pgx supports Go 1.20 and higher and PostgreSQL 11 and higher. pgx also is tested against the latest version of [CockroachDB](https://www.cockroachlabs.com/product/).
+pgx supports the same versions of Go and PostgreSQL that are supported by their respective teams. For [Go](https://golang.org/doc/devel/release.html#policy) that is the two most recent major releases and for [PostgreSQL](https://www.postgresql.org/support/versioning/) the major releases in the last 5 years. This means pgx supports Go 1.20 and higher and PostgreSQL 12 and higher. pgx also is tested against the latest version of [CockroachDB](https://www.cockroachlabs.com/product/).
 
 ## Version Policy