Update C++ to use standard SDL MIXER version 2

Co-authored-by: sigonasr2 <sigonasr2@gmail.com>

C++/scripts/md5

@@ -1,3 +1,3 @@
 build.sh:530634457ea9041267c05d4ced95eee1  -
 commit.sh:d03a46e721060c22ccb146e19d27e70a  -
-web.sh:241ce74055952325f82f009b494df250  -
+web.sh:3dcc2fe7e036359eedd257a864e9a1e1  -

C++/scripts/web.sh

@@ -1,9 +1,9 @@
 #Compiles emscripten instance of this project for the web.
 #C++
 if [ -d "assets" ]; then
-    em++ -std=c++17 -O2 -s ALLOW_MEMORY_GROWTH=1 -s MAX_WEBGL_VERSION=2 -s MIN_WEBGL_VERSION=2 -s USE_LIBPNG=1 $(find . -type f -name "*.cpp") -o ${PROJECT_NAME}.html -I pixelGameEngine.h --preload-file ./assets
+    em++ -std=c++17 -O2 -s ALLOW_MEMORY_GROWTH=1 -s MAX_WEBGL_VERSION=2 -s MIN_WEBGL_VERSION=2 -s USE_SDL_MIXER=2 -s USE_LIBPNG=1 $(find . -type f -name "*.cpp") -o ${PROJECT_NAME}.html -I pixelGameEngine.h --preload-file ./assets
 else
-    em++ -std=c++17 -O2 -s ALLOW_MEMORY_GROWTH=1 -s MAX_WEBGL_VERSION=2 -s MIN_WEBGL_VERSION=2 -s USE_LIBPNG=1 $(find . -type f -name "*.cpp") -o ${PROJECT_NAME}.html -I pixelGameEngine.h
+    em++ -std=c++17 -O2 -s ALLOW_MEMORY_GROWTH=1 -s MAX_WEBGL_VERSION=2 -s MIN_WEBGL_VERSION=2 -s USE_SDL_MIXER=2 -s USE_LIBPNG=1 $(find . -type f -name "*.cpp") -o ${PROJECT_NAME}.html -I pixelGameEngine.h 
 fi
 
 cp buildtemplate.html ${PROJECT_NAME}.html
@@ -15,3 +15,4 @@ if [ "$1" == "headless" ]; then
 else
     emrun --serve_after_close ${PROJECT_NAME}.html
 fi
+