fix: fix module import of local css files

css2json-loader.spec.ts

@@ -38,7 +38,7 @@ describe("css2jsonLoader", () => {
 
             const loaderContext = {
                 callback: (error, source: string, map) => {
-                    expect(source).toContain(`global.registerModule("custom.css", () => require("custom.css"))`);
+                    expect(source).toContain(`global.registerModule("./custom.css", () => require("./custom.css"))`);
                     expect(source).toContain(`{"type":"declaration","property":"background-color","value":"#7f9"}`);
 
                     done();
@@ -52,7 +52,7 @@ describe("css2jsonLoader", () => {
     it("inlines css2json loader in imports if option is provided", (done) => {
         const loaderContext = {
             callback: (error, source: string, map) => {
-                expect(source).toContain(`global.registerModule("custom.css", () => require("!nativescript-dev-webpack/css2json-loader?useForImports!custom.css"))`);
+                expect(source).toContain(`global.registerModule("./custom.css", () => require("!nativescript-dev-webpack/css2json-loader?useForImports!./custom.css"))`);
                 expect(source).toContain(`{"type":"declaration","property":"background-color","value":"#7f9"}`);
 
                 done();

css2json-loader.ts

@@ -1,6 +1,6 @@
 import { parse, Import, Stylesheet } from "css";
 import { loader } from "webpack";
-import { getOptions } from "loader-utils";
+import { getOptions, urlToRequest } from "loader-utils";
 
 const betweenQuotesPattern = /('|")(.*?)\1/;
 const unpackUrlPattern = /url\(([^\)]+)\)/;
@@ -53,7 +53,7 @@ function extractUrlFromRule(importRule: Import): string {
 function createRequireUri(uri): { uri: string, requireURI: string } {
     return {
         uri: uri,
-        requireURI: uri[0] === "~" && uri[1] !== "/" ? uri.substr(1) : uri
+        requireURI: urlToRequest(uri)
     };
 }