JS: Add ImportGraph meta query

javascript/ql/src/meta/alerts/ImportGraph.ql

@@ -0,0 +1,15 @@
+/**
+ * @name Import graph
+ * @description An edge in the import graph.
+ * @kind problem
+ * @problem.severity recommendation
+ * @id js/meta/alerts/import-graph
+ * @tags meta
+ * @precision very-low
+ */
+
+import javascript
+
+from Import imprt, Module target
+where target = imprt.getImportedModule()
+select imprt, "Import targeting $@", target, target.getFile().getRelativePath()