refactor: rename FormatOption#STRIKE_THROUGH to FormatOption#STRIKETHROUGH

Author: darvil82

src/main/java/textFormatter/FormatOption.java

@@ -22,7 +22,7 @@ public enum FormatOption {
 	REVERSE(7),
 	/** Hides the text. */
 	HIDDEN(8),
-	STRIKE_THROUGH(9);
+	STRIKETHROUGH(9);
 
 	private final byte value;