CI: Build plugin with latest known stable release of OBS

CI/install-dependencies-osx.sh

@@ -13,6 +13,7 @@ brew install qt5
 cd ..
 git clone --recursive https://github.com/jp9000/obs-studio
 cd obs-studio
+git checkout 18.0.1
 mkdir build && cd build
 cmake .. \
   -DCMAKE_PREFIX_PATH=$(brew --prefix qt5)/lib/cmake \

CI/install-dependencies-xenial.sh

@@ -48,6 +48,7 @@ apt-get install -y libqt5websockets5-dev
 cd /root
 git clone https://github.com/jp9000/obs-studio ./obs-studio
 cd obs-studio
+git checkout 18.0.1
 mkdir build && cd build
 cmake -DUNIX_STRUCTURE=1 -DCMAKE_INSTALL_PREFIX=/usr ..
 make -j4

appveyor.yml

@@ -15,7 +15,7 @@ install:
   - set build_config=Release
   - git clone --recursive https://github.com/jp9000/obs-studio
   - cd C:\projects\obs-studio\
-  - git checkout 18.0.0
+  - git checkout 18.0.1
   - mkdir build
   - mkdir build32
   - mkdir build64