fix(paths-plugin): properly skip .d.ts files

Author: s-panferov

src/paths-plugin.ts

@@ -116,13 +116,17 @@ export class PathPlugin implements ResolverPlugin {
         }
 
         mappings.forEach(mapping => {
-            if (mapping.target.indexOf('@types') === -1) {
-                // skip "phantom" type references
+            // skip "phantom" type references
+            if (!this.isTyping(mapping.target)) {
                 resolver.plugin(this.source, this.createPlugin(resolver, mapping));
             }
         });
     }
 
+    isTyping(target: string) {
+        return target.indexOf('@types') !== -1 || target.indexOf('.d.ts') !== -1;
+    }
+
     createPlugin(resolver: Resolver, mapping: Mapping) {
         return (request, callback) => {
             let innerRequest = getInnerRequest(resolver, request);