Support code injection in webpack 5 (#1563)

Author: Marc-Andre-Rivet

@plotly/dash-component-plugins/LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2019 Plotly
+Copyright (c) 2021 Plotly, Inc
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

@plotly/webpack-dash-dynamic-import/LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2019 Plotly
+Copyright (c) 2021 Plotly, Inc
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

@plotly/webpack-dash-dynamic-import/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@plotly/webpack-dash-dynamic-import",
-  "version": "1.1.5",
+  "version": "1.2.0",
   "description": "Webpack Plugin for Dynamic Import in Dash",
   "repository": {
     "type": "git",

@plotly/webpack-dash-dynamic-import/src/index.js

@@ -78,10 +78,7 @@ class WebpackDashDynamicImport {
     apply(compiler) {
         compiler.hooks.compilation.tap('WebpackDashDynamicImport', compilation => {
             compilation.mainTemplate.hooks.requireExtensions.tap('WebpackDashDynamicImport > RequireExtensions', (source, chunk, hash) => {
-                return [
-                    source,
-                    resolveImportSource()
-                ]
+                return source + resolveImportSource();
             });
         });
     }

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2020 Plotly, Inc
+Copyright (c) 2021 Plotly, Inc
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal