patch 8.2.2090: Vim9: dict does not accept a key in quotes

Problem:    Vim9: dict does not accept a key in quotes.
Solution:   Recognize a key in single or double quotes.
diff --git a/src/version.c b/src/version.c
index 8b8a6c3..2061ea0 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2090,
+/**/
     2089,
 /**/
     2088,