test: fix flaky decimal.TestSelect

We forgot to increase the timeout [1] when we fixed tests for macos.

1. 521c0c3

Author: oleg-jukovec

CHANGELOG.md

@@ -32,6 +32,8 @@ Versioning](http://semver.org/spec/v2.0.0.html) except to the first release.
 
 ### Fixed
 
+- Flaky decimal/TestSelect (#300)
+
 ## [1.12.0] - 2023-06-07
 
 The release introduces the ability to gracefully close Connection

decimal/decimal_test.go

@@ -21,7 +21,7 @@ var isDecimalSupported = false
 
 var server = "127.0.0.1:3013"
 var opts = Opts{
-	Timeout: 500 * time.Millisecond,
+	Timeout: 5 * time.Second,
 	User:    "test",
 	Pass:    "test",
 }