Fix tests

Author: mayank1513

lib/src/declaration.d.ts

@@ -2,3 +2,7 @@ declare module "*.glsl" {
   const value: string;
   export default value;
 }
+declare module "*.glsl?raw" {
+  const value: string;
+  export default value;
+}

lib/src/simulator.ts

@@ -1,7 +1,7 @@
-import updateVertexShaderSource from "./shaders/update-vert.glsl";
-import updateFragmentShaderSource from "./shaders/update-frag.glsl";
-import renderVertexShaderSource from "./shaders/render-vert.glsl";
-import renderFragmentShaderSource from "./shaders/render-frag.glsl";
+import updateVertexShaderSource from "./shaders/update-vert.glsl?raw";
+import updateFragmentShaderSource from "./shaders/update-frag.glsl?raw";
+import renderVertexShaderSource from "./shaders/render-vert.glsl?raw";
+import renderFragmentShaderSource from "./shaders/render-frag.glsl?raw";
 
 /** shader names */
 // Uniforms