Updated verify_license.py to support Swift, C and Objective-C++ source files. (AcademySoftwareFoundation#1288)

Signed-off-by: Michele Spina <[email protected]>

Author: jminor

maintainers/verify_license.py

@@ -15,9 +15,18 @@
 """,
     ".cpp": """// SPDX-License-Identifier: Apache-2.0
 // Copyright Contributors to the OpenTimelineIO project
+""",
+    ".c": """// SPDX-License-Identifier: Apache-2.0
+// Copyright Contributors to the OpenTimelineIO project
 """,
     ".h": """// SPDX-License-Identifier: Apache-2.0
 // Copyright Contributors to the OpenTimelineIO project
+""",
+    ".swift": """// SPDX-License-Identifier: Apache-2.0
+// Copyright Contributors to the OpenTimelineIO project
+""",
+    ".mm": """// SPDX-License-Identifier: Apache-2.0
+// Copyright Contributors to the OpenTimelineIO project
 """
 }