test: setup jest and everything

tsconfig.json

@@ -1,10 +1,13 @@
 {
   "compilerOptions": {
     "target": "ESNext",
-    "lib": ["DOM", "DOM.Iterable", "ESNext"],
+    "lib": [
+      "DOM",
+      "DOM.Iterable",
+      "ESNext"
+    ],
     "module": "ESNext",
     "skipLibCheck": true,
-
     /* Bundler mode */
     "moduleResolution": "bundler",
     "allowImportingTsExtensions": true,
@@ -12,18 +15,24 @@
     "isolatedModules": true,
     "noEmit": true,
     "jsx": "react-jsx",
-
     /* Linting */
     "strict": true,
     "noUnusedLocals": true,
     "noUnusedParameters": true,
     "noFallthroughCasesInSwitch": true,
-
     "baseUrl": ".",
     "paths": {
-      "~/*": ["src/*"]
-    }
+      "~/*": [
+        "src/*"
+      ]
+    },
   },
-  "include": ["src"],
-  "references": [{ "path": "./tsconfig.node.json" }]
-}
+  "include": [
+    "src"
+  ],
+  "references": [
+    {
+      "path": "./tsconfig.node.json"
+    }
+  ]
+}