patch 8.2.0213: configure does not recognize gcc 10.0 and later

Problem:    Configure does not recognize gcc 10.0 and later.
Solution:   Adjust the pattern matching the version number. (Sergei
            Trofimovich, closes #5580)
diff --git a/src/version.c b/src/version.c
index af6ecdf..e1a2e98 100644
--- a/src/version.c
+++ b/src/version.c
@@ -743,6 +743,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    213,
+/**/
     212,
 /**/
     211,