fix setting macos version

Author: Stefan-Olt

plugins/bs.json

@@ -1101,9 +1101,7 @@
 				]
 			},
 			"tests": {
-				".*": [
-					"test-bs-av1"
-				]
+				".*": [ "test-bs-av1" ]
 			}
 		}
 	]

vsp-build.py

@@ -64,7 +64,7 @@ def setup_environment() -> bool:
 
 def setup_env_os_version(version: str) -> bool:
     global environment
-    if str == None:
+    if version == None:
         return True
     if pf.uname().system == 'Darwin':
         environment['MACOS_DEPLOYMENT_TARGET'] = version