add libsquish

Author: Laserlicht

conanfile.py

@@ -19,6 +19,7 @@ class VCMI(ConanFile):
         "sdl_image/[^2.8.2]",
         "sdl_mixer/[^2.8.0]",
         "sdl_ttf/[^2.0.18]",
+        "libsquish/[^1.15]",
     ]
     _launcherRequires = [
         "xz_utils/[^5.2.5]", # innoextract
@@ -44,6 +45,9 @@ def config_options(self):
         self.options["sdl_mixer"].shared = isSdlShared
         self.options["sdl_ttf"].shared = isSdlShared
 
+        self.options["libsquish"].openmp = True
+        self.options["libsquish"].sse2_intrinsics = True
+
         if self.settings.os == "Android":
             self.options["qt"].android_sdk = getenv("ANDROID_HOME")