Add function keys up to F24

input/input.go

@@ -59,6 +59,18 @@ const (
 	KeyF10 Key = 138
 	KeyF11 Key = 139
 	KeyF12 Key = 140
+	KeyF13 Key = 141
+	KeyF14 Key = 142
+	KeyF15 Key = 143
+	KeyF16 Key = 144
+	KeyF17 Key = 145
+	KeyF18 Key = 146
+	KeyF19 Key = 147
+	KeyF20 Key = 148
+	KeyF21 Key = 149
+	KeyF22 Key = 150
+	KeyF23 Key = 151
+	KeyF24 Key = 152
 )
 
 // Button represents a mouse button.