patch 9.0.0956: terminal tests fail when using key with modifier

Problem:    Terminal tests fail when using key with modifier.
Solution:   Use the modifyOtherKeys encoding when using RunVimInTerminal().

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    956,
 /**/
     955,
 /**/