Update PostgreSQL driver library

vendor/github.com/lib/pq/issues_test.go

@@ -0,0 +1,26 @@
+package pq
+
+import "testing"
+
+func TestIssue494(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	query := `CREATE TEMP TABLE t (i INT PRIMARY KEY)`
+	if _, err := db.Exec(query); err != nil {
+		t.Fatal(err)
+	}
+
+	txn, err := db.Begin()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if _, err := txn.Prepare(CopyIn("t", "i")); err != nil {
+		t.Fatal(err)
+	}
+
+	if _, err := txn.Query("SELECT 1"); err == nil {
+		t.Fatal("expected error")
+	}
+}