Update neon-audio core module dependency (#730)

# Description
Update audio module to resolve observed Mark2 errors around
`get_response`

# Issues
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# Other Notes
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requirements/core_modules.txt

@@ -3,4 +3,4 @@ neon-messagebus~=2.0,>=2.0.2a10
 neon-enclosure~=1.7,>=1.7.1a7
 neon-speech~=4.4,>=4.4.2a7
 neon-gui~=1.3,>=1.3.1a5
-neon-audio~=1.5,>=1.5.2a12
+neon-audio~=1.5,>=1.5.2a13