Fix webpack issues by using a workaround

The workaround is described in webpack/webpack#7352
Note that now the webserver cannot load our wasm:
"TypeError: _myelin_visualization_bg__WEBPACK_IMPORTED_MODULE_0__.init is not a function"
This might be caused by a transcient dependency on stdweb:
https://github.com/sebcrozet/nphysics/blob/master/build/nphysics2d/Cargo.toml#L31
Which is incompatible with wasm-bindgen:
koute/stdweb#263

visualization/package.json

@@ -4,14 +4,15 @@
         "serve": "webpack-dev-server"
     },
     "devDependencies": {
+        "file-loader": "^2.0.0",
         "ts-loader": "^4.4.2",
-        "typescript": "^2.9.2",
-        "webpack": "^4.0.1",
-        "webpack-cli": "^2.0.10",
-        "webpack-dev-server": "^3.1.0",
         "tslint": "^5.5.0",
         "tslint-config-standard": "^7.1.0",
         "tslint-consistent-codestyle": "^1.6.0",
-        "tslint-immutable": "^4.0.2"
+        "tslint-immutable": "^4.0.2",
+        "typescript": "^2.9.2",
+        "webpack": "^4.0.1",
+        "webpack-cli": "^2.0.10",
+        "webpack-dev-server": "^3.1.0"
     }
-}
+}

visualization/webpack.config.js

@@ -2,14 +2,25 @@ const path = require('path');
 
 module.exports = {
   entry: "./src/main.ts",
+  node: false,
+  mode: "development",
   module: {
     rules: [{
-      test: /\.ts$/,
-      use: 'ts-loader',
-      exclude: /node_modules/
-    }]
+        test: /\.ts$/,
+        exclude: /node_modules/,
+        use: 'ts-loader',
+      },
+      {
+        test: /\.wasm$/,
+        exclude: /node_modules/,
+        type: "javascript/auto",
+        loader: "file-loader",
+        options: {
+          publicPath: "dist/"
+        }
+      }
+    ]
   },
-  node: false,
   output: {
     publicPath: '/dist/',
     path: path.resolve(__dirname, "dist"),
@@ -18,5 +29,4 @@ module.exports = {
   resolve: {
     extensions: ['.ts', '.js', '.wasm'],
   },
-  mode: "development",
-};
+};

visualization/yarn.lock

@@ -197,6 +197,10 @@ acorn@^5.0.0, acorn@^5.6.2:
   version "5.7.2"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.2.tgz#91fa871883485d06708800318404e72bfb26dcc5"
 
+ajv-errors@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/ajv-errors/-/ajv-errors-1.0.0.tgz#ecf021fa108fd17dfb5e6b383f2dd233e31ffc59"
+
 ajv-keywords@^3.1.0:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-3.2.0.tgz#e86b819c602cf8821ad637413698f1dec021847a"
@@ -2089,6 +2093,13 @@ figures@^2.0.0:
   dependencies:
     escape-string-regexp "^1.0.5"
 
+file-loader@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/file-loader/-/file-loader-2.0.0.tgz#39749c82f020b9e85901dcff98e8004e6401cfde"
+  dependencies:
+    loader-utils "^1.0.2"
+    schema-utils "^1.0.0"
+
 filename-regex@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/filename-regex/-/filename-regex-2.0.1.tgz#c1c4b9bee3e09725ddb106b75c1e301fe2f18b26"
@@ -4495,6 +4506,14 @@ schema-utils@^0.4.4, schema-utils@^0.4.5:
     ajv "^6.1.0"
     ajv-keywords "^3.1.0"
 
+schema-utils@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/schema-utils/-/schema-utils-1.0.0.tgz#0b79a93204d7b600d4b2850d1f66c2a34951c770"
+  dependencies:
+    ajv "^6.1.0"
+    ajv-errors "^1.0.0"
+    ajv-keywords "^3.1.0"
+
 scoped-regex@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/scoped-regex/-/scoped-regex-1.0.0.tgz#a346bb1acd4207ae70bd7c0c7ca9e566b6baddb8"