Pg to bun (#148)

* start moving to bun

* changing more stuff

* more

* and yet more

* tests passing

* seems stable now

* more big changes

* small fix

* little fixes

vendor/github.com/jackc/pgconn/README.md

@@ -0,0 +1,56 @@
+[![](https://godoc.org/github.com/jackc/pgconn?status.svg)](https://godoc.org/github.com/jackc/pgconn)
+![CI](https://github.com/jackc/pgconn/workflows/CI/badge.svg)
+
+# pgconn
+
+Package pgconn is a low-level PostgreSQL database driver. It operates at nearly the same level as the C library libpq.
+It is primarily intended to serve as the foundation for higher level libraries such as https://github.com/jackc/pgx.
+Applications should handle normal queries with a higher level library and only use pgconn directly when required for
+low-level access to PostgreSQL functionality.
+
+## Example Usage
+
+```go
+pgConn, err := pgconn.Connect(context.Background(), os.Getenv("DATABASE_URL"))
+if err != nil {
+	log.Fatalln("pgconn failed to connect:", err)
+}
+defer pgConn.Close(context.Background())
+
+result := pgConn.ExecParams(context.Background(), "SELECT email FROM users WHERE id=$1", [][]byte{[]byte("123")}, nil, nil, nil)
+for result.NextRow() {
+	fmt.Println("User 123 has email:", string(result.Values()[0]))
+}
+_, err = result.Close()
+if err != nil {
+	log.Fatalln("failed reading result:", err)
+}
+```
+
+## Testing
+
+The pgconn tests require a PostgreSQL database. It will connect to the database specified in the `PGX_TEST_CONN_STRING`
+environment variable. The `PGX_TEST_CONN_STRING` environment variable can be a URL or DSN. In addition, the standard `PG*`
+environment variables will be respected. Consider using [direnv](https://github.com/direnv/direnv) to simplify
+environment variable handling.
+
+### Example Test Environment
+
+Connect to your PostgreSQL server and run:
+
+```
+create database pgx_test;
+```
+
+Now you can run the tests:
+
+```bash
+PGX_TEST_CONN_STRING="host=/var/run/postgresql dbname=pgx_test" go test ./...
+```
+
+### Connection and Authentication Tests
+
+Pgconn supports multiple connection types and means of authentication. These tests are optional. They
+will only run if the appropriate environment variable is set. Run `go test -v | grep SKIP` to see if any tests are being
+skipped. Most developers will not need to enable these tests. See `ci/setup_test.bash` for an example set up if you need change
+authentication code.