custom keybinds multiple keypress fix. [add backslash to Parser] (#513)

* fixed input sending bug not properly releasing keys

* updated to ovr 1.12.5

* added disable oculus api button experimental

* small refactor and fix float and bool bugs

* added nokeyup events to modifier keys when read in, and adjusted  token send to have proper logic

* fixed literal held issue

* added backslash

* fixed sender token parser

* updated version string to dev whoops

* added backslash to documentation for keyboard input

src/keyboard_input/input_sender_win.cpp

@@ -94,6 +94,8 @@ WORD convertToVirtualKeycode( const Token token )
         return VK_LWIN;
     case Token::MODIFIER_TILDE:
         return VK_OEM_3;
+    case Token::KEY_BACKSLASH:
+        return VK_OEM_5;
 
     default:
         return 0;