Add configuration and dependencies to support Typescript (#37)

This change adds basic, non-optimal support for Typescript with
webpack. It functions well in development mode and deployment boots
ProDOS. There are probably many ways this configuration can be sped
up, but I haven't investigated that yet.

Note that no Typescript files are added in this change; it is merely a
configuration change.

jest.config.js

@@ -0,0 +1,13 @@
+module.exports = {
+  "roots": [
+    "js/",
+    "test/",
+  ],
+  "testMatch": [
+    "**/?(*.)+(spec|test).+(ts|js)"
+  ],
+  "transform": {
+    "^.+\\.js$": "babel-jest",
+    "^.+\\.ts$": "ts-jest"
+  },
+}

package.json

@@ -26,13 +26,17 @@
   "devDependencies": {
     "@babel/core": "^7.9.0",
     "@babel/preset-env": "^7.9.0",
+    "@types/jest": "^26.0.14",
     "ajv": "^6.12.0",
     "babel-jest": "^25.1.0",
     "eslint": "^6.8.0",
     "file-loader": "^6.0.0",
-    "jest": "^25.1.0",
+    "jest": "^25.5.4",
     "node-forge": "^0.10.0",
     "raw-loader": "^4.0.0",
+    "ts-jest": "^26.4.1",
+    "ts-loader": "^8.0.5",
+    "typescript": "^4.0.3",
     "webpack": "^4.42.0",
     "webpack-cli": "^3.3.11",
     "webpack-dev-server": "^3.11.0"

tsconfig.json

@@ -0,0 +1,24 @@
+{
+  "compilerOptions": {
+      "module": "commonjs",
+      "esModuleInterop": true,
+      "allowSyntheticDefaultImports": true,
+      "target": "es6",
+      "noImplicitAny": true,
+      "moduleResolution": "node",
+      "sourceMap": true,
+      "strictNullChecks": true,
+      "outDir": "dist",
+      "baseUrl": ".",
+      "allowJs": true,
+      "paths": {
+          "*": [
+              "node_modules/*",
+              "src/types/*"
+          ]
+      }
+  },
+  "include": [
+      "js/**/*"
+  ]
+}

webpack.config.js

@@ -39,6 +39,18 @@ module.exports =
                     },
                 ],
             },
+            {
+                test: /\.ts$/i,
+                use: [
+                    {
+                        loader: 'ts-loader'
+                    },
+                ],
+                exclude: /node_modules/,
+            }
         ],
     },
+    resolve: {
+        extensions: ['.ts', '.js'],
+    },
 };