fix: sql-template-strings/tag compatibility (#2238)

Author: BauerPh

lib/connection.js

@@ -622,7 +622,8 @@ class Connection extends EventEmitter {
       // execute(options, cb)
       options = {
         ...options,
-        ...sql
+        ...sql,
+        sql: sql.sql
       };
       if (typeof values === 'function') {
         cb = values;
@@ -911,7 +912,8 @@ class Connection extends EventEmitter {
       // query(options, cb)
       options = {
         ...options,
-        ...sql
+        ...sql,
+        sql: sql.sql
       };
       if (typeof values === 'function') {
         cb = values;