patch 8.2.0373: type of term_sendkeys() is unknown

Problem:    Type of term_sendkeys() is unknown.
Solution:   Just return zero. (closes #5762)
diff --git a/src/version.c b/src/version.c
index 2bf4b24..e55c261 100644
--- a/src/version.c
+++ b/src/version.c
@@ -739,6 +739,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    373,
+/**/
     372,
 /**/
     371,