Update to 0.25-rc1
diff --git a/git.go b/git.go
index 77394cf..cb973ee 100644
--- a/git.go
+++ b/git.go
@@ -8,8 +8,8 @@
 #include <git2.h>
 #include <git2/sys/openssl.h>
 
-#if LIBGIT2_VER_MAJOR != 0 || LIBGIT2_VER_MINOR != 24
-# error "Invalid libgit2 version; this git2go supports libgit2 v0.24"
+#if LIBGIT2_VER_MAJOR != 0 || LIBGIT2_VER_MINOR != 25
+# error "Invalid libgit2 version; this git2go supports libgit2 v0.25"
 #endif
 
 */
diff --git a/vendor/libgit2 b/vendor/libgit2
index a051ee3..ae5838f 160000
--- a/vendor/libgit2
+++ b/vendor/libgit2
@@ -1 +1 @@
-Subproject commit a051ee31f2a3790410c2b482611f691135d2eae0
+Subproject commit ae5838f118a4819e608990a815bf8fc482be5772