Find raylib even if pkg-config is not found

meson.build

@@ -1,9 +1,12 @@
 project('Pong', ['cpp', 'c'])
 add_global_arguments('-g', '-Wall', '-pedantic', '-Wno-unused-function', '-Werror', language : ['cpp', 'c'])
+compiler = meson.get_compiler('cpp')
 
-raylib = dependency('raylib', native: true)
+raylib = dependency('raylib', required: false)
+if not raylib.found()
+	raylib = meson.find_library('raylib', has_headers: ['raylib.h', 'raymath.h'], required: true)
+endif
 
-compiler = meson.get_compiler('cpp')
 ws2_dep = compiler.find_library('ws2_32', required: false)
 
 executable('pong',