Update version to 0.7.8.
diff --git a/main.c b/main.c
index 6f8490f..174cf7d 100644
--- a/main.c
+++ b/main.c
@@ -9,7 +9,7 @@
 #ifndef TOYBOX_VENDOR
 #define TOYBOX_VENDOR ""
 #endif
-#define TOYBOX_VERSION "0.7.7"TOYBOX_VENDOR
+#define TOYBOX_VERSION "0.7.8"TOYBOX_VENDOR
 #endif
 
 // Populate toy_list[].