libsForQt5.libopenshot-audio: 0.1.4 -> 0.1.5

Semi-automatic update generated by https://github.com/ryantm/nix-update tools. These checks were done:

- built on NixOS
- Warning: no binary found that responded to help or version flags. (This warning appears even if the package isn't expected to have binaries.)
- found 0.1.5 with grep in /nix/store/0a0pk23wn2jqnkc9h7jb0i0wp8b5zkzm-libopenshot-audio-0.1.5
- found 0.1.5 in filename of file in /nix/store/0a0pk23wn2jqnkc9h7jb0i0wp8b5zkzm-libopenshot-audio-0.1.5
- directory tree listing: https://gist.github.com/6096ee421bf911b453a5b862e61452ec