fix(bug): Add slashes if win32

src/.cache/GlobalStyleComponent.js

@@ -0,0 +1,2 @@
+import GlobalStyleComponent from "C:\\Users\\magnusga\\Dev\\plugins\\gatsby-plugin-global-styles\\src\\styles\\GlobalStyleComponent";
+export default GlobalStyleComponent;

src/.cache/GlobalStylePropsOther.js

@@ -0,0 +1,2 @@
+const otherProps = {"light":true};
+export default otherProps;

src/.cache/GlobalStylePropsTheme.js

@@ -0,0 +1,2 @@
+import theme from "C:\\Users\\magnusga\\Dev\\plugins\\gatsby-plugin-global-styles\\src\\styles\\theme";
+export default theme;

src/gatsby-node.js

@@ -28,7 +28,7 @@ export const onPreBootstrap = ({ store }, pluginOptions) => {
 export default GlobalStyleComponent;
 `;
 
-    fixPath(module);
+    module = fixPath(module);
   } else {
     module = `import { createGlobalStyle } from '@nfront/global-styles';
 const GlobalStyleComponent = createGlobalStyle\`\`;
@@ -54,7 +54,7 @@ export default GlobalStyleComponent;
 export default theme;
 `;
 
-    fixPath(module);
+    module = fixPath(module);
   } else {
     module = `const defaultTheme = { typography: { fontFamily: 'Arial' } };
 export default defaultTheme;