Bump version number and update changelog

Author: myrsloik

doc/ffms2-changelog.md

@@ -1,6 +1,7 @@
 # FFmpegSource2 Changelog
 
-- 2.2000
+- 2.40
+  - Avisynth+ linux support (qyot27)
   - Added LastEndTime track property to make it possible to take the last frame's duration into account (Myrsloik)
   - Removed several deprecated functions and enums from the API (Myrsloik)
   - No longer assumes sub 1 fps framerates are invalid (Myrsloik)

include/ffms.h

@@ -22,7 +22,7 @@
 #define FFMS_H
 
 // Version format: major - minor - micro - bump
-#define FFMS_VERSION ((2 << 24) | (31 << 16) | (0 << 8) | 0)
+#define FFMS_VERSION ((2 << 24) | (40 << 16) | (0 << 8) | 0)
 
 #include <stdint.h>
 #include <stddef.h>