libsForQt5.libopenshot: 0.1.7 -> 0.1.9

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 0.1.9 with grep in /nix/store/nrg54a2kxlz3r8c4wf2if5vzq0y452fs-libopenshot-0.1.9
- found 0.1.9 in filename of file in /nix/store/nrg54a2kxlz3r8c4wf2if5vzq0y452fs-libopenshot-0.1.9
- directory tree listing: https://gist.github.com/a521e923923cd5ac4f188b8dede33a2e