add TypeORM to javascript.qll file

add tests
improvement on comments

javascript/ql/test/library-tests/frameworks/SQL/sqlite3.js

@@ -0,0 +1,10 @@
+// Adapted from https://github.com/mapbox/node-sqlite3/wiki/API, which is
+// part of the node-sqlite3 project, which is licensed under the BSD 3-Clause
+// License; see file node-sqlite3-LICENSE.
+var sqlite = require('sqlite3');
+
+var db = new sqlite.Database(":memory:");
+db.run("UPDATE tbl SET name = ? WHERE id = ?", "bar", 2)
+  .run("UPDATE tbl SET name = ? WHERE id = ?", "foo", 3);
+
+exports.db = db;