Change version to 6.0.0

The major version number has been incremented only because there's a
chance that a sketch that sets text wrap on will behave differently,
due to the changes in the way wrapping is now handled.

extras/Doxyfile

@@ -5,7 +5,7 @@
 #---------------------------------------------------------------------------
 DOXYFILE_ENCODING      = UTF-8
 PROJECT_NAME           = "Arduboy2 Library"
-PROJECT_NUMBER         = 5.3.0
+PROJECT_NUMBER         = 6.0.0
 PROJECT_BRIEF          =
 PROJECT_LOGO           =
 OUTPUT_DIRECTORY       = doxygen

library.json

@@ -7,7 +7,7 @@
         "type": "git",
         "url": "https://github.com/MLXXXp/Arduboy2.git"
     },
-    "version": "5.3.0",
+    "version": "6.0.0",
     "export":
     {
         "exclude": "extras"

library.properties

@@ -1,5 +1,5 @@
 name=Arduboy2
-version=5.3.0
+version=6.0.0
 author=Chris J. Martinez, Kevin Bates, Josh Goebel, Scott Allen, Ross O. Shoger
 maintainer=Scott Allen <saydisp-git@yahoo.ca>
 sentence=An alternative library for use with the Arduboy game system.

src/Arduboy2.h

@@ -34,7 +34,7 @@
  * #endif
  * \endcode
  */
-#define ARDUBOY_LIB_VER 50300
+#define ARDUBOY_LIB_VER 60000
 
 // EEPROM settings
 /** \brief