Fix requirements for macos and python 3.8

Author: spectranaut

tools/wptrunner/requirements.txt

@@ -7,8 +7,11 @@ mozprocess==1.3.1
 packaging==25.0
 pillow==10.4.0; python_version < '3.9'
 pillow==11.3.0; python_version >= '3.9'
-pyobjc-framework-Accessibility; sys_platform == 'darwin' # For executorplatformaccessibility
-pyobjc-framework-ApplicationServices; sys_platform == 'darwin' # For executorplatformaccessibility
+pyobjc-framework-Accessibility==11.1; sys_platform == 'darwin' and python_version >= '3.9' # For executorplatformaccessibility
+pyobjc-framework-ApplicationServices==11.1; sys_platform == 'darwin' and python_version >= '3.9' # For executorplatformaccessibility
+pyobjc==10.3.2; sys_platform == 'darwin' and python_version < '3.9' # For executorplatformaccessibility
+pyobjc-framework-Accessibility==10.3.2; sys_platform == 'darwin' and python_version < '3.9' # For executorplatformaccessibility
+pyobjc-framework-ApplicationServices==10.3.2; sys_platform == 'darwin' and python_version < '3.9' # For executorplatformaccessibility
 requests==2.32.3
 types-requests==2.32.0.20241016
 six==1.16.0