Vim 8.1 release

Update version number and information.  Fix a couple of tests.
diff --git a/src/proto/search.pro b/src/proto/search.pro
index 4e63bf3..eeaa37c 100644
--- a/src/proto/search.pro
+++ b/src/proto/search.pro
@@ -5,10 +5,10 @@
 void save_re_pat(int idx, char_u *pat, int magic);
 void save_search_patterns(void);
 void restore_search_patterns(void);
+void free_search_patterns(void);
 void save_last_search_pattern(void);
 void restore_last_search_pattern(void);
 char_u *last_search_pattern(void);
-void free_search_patterns(void);
 int ignorecase(char_u *pat);
 int ignorecase_opt(char_u *pat, int ic_in, int scs);
 int pat_has_uppercase(char_u *pat);