[sql-hint addon] Treat single quotes like double quotes when looking …

…at tokens

See https://discuss.codemirror.net/t/codemirror-ignore-show-hints-if-the-class-is-cm-string/2513

addon/hint/sql-hint.js

@@ -264,7 +264,7 @@
       token.string = token.string.slice(0, cur.ch - token.start);
     }
 
-    if (token.string.match(/^[.`"\w@][\w$#]*$/g)) {
+    if (token.string.match(/^[.`"'\w@][\w$#]*$/g)) {
       search = token.string;
       start = token.start;
       end = token.end;