Update version number

appveyor.yml

-version: 2.2.11.{branch}-{build}
+version: 2.2.12.{branch}-{build}
 os: MinGW
 
 environment:

src/version.h

-#define SRB2VERSION "2.2.11"/* this must be the first line, for cmake !! */
+#define SRB2VERSION "2.2.12"/* this must be the first line, for cmake !! */
 
 // The Modification ID; must be obtained from a Master Server Admin ( https://mb.srb2.org/members/?key=ms_admin ).
 // DO NOT try to set this otherwise, or your modification will be unplayable through the Master Server.
@@ -9,7 +9,7 @@
 // it's only for detection of the version the player is using so the MS can alert them of an update.
 // Only set it higher, not lower, obviously.
 // Note that we use this to help keep internal testing in check; this is why v2.2.0 is not version "1".
-#define MODVERSION 52
+#define MODVERSION 53
 
 // Define this as a prerelease version suffix (pre#, RC#)
 //#define BETAVERSION "pre1"

src/win32/Srb2win.rc

@@ -77,8 +77,8 @@ END
 #include "../doomdef.h" // Needed for version string
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 2,2,11,0
- PRODUCTVERSION 2,2,11,0
+ FILEVERSION 2,2,12,0
+ PRODUCTVERSION 2,2,12,0
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L