Made member methods const (#34)

* refactor: update function name checks to use contains method

* refactor: update code generation to use static_cast

* refactor: made member methods const

* refactor: made range-based loop

* refactor: make one variable constructor explicit

* refactor: remove redundant else

* refactor: turn includes to forward declarations

* refactor: brace placements turned into allman style

ps2xTest/src/code_generator_tests.cpp

@@ -1,6 +1,7 @@
 #include "MiniTest.h"
 #include "ps2recomp/code_generator.h"
 #include "ps2recomp/instructions.h"
+#include "ps2recomp/types.h"
 
 using namespace ps2recomp;