Add typescript type support

Author: k1w1

.prettierrc

@@ -0,0 +1,7 @@
+{
+  "jsxSingleQuote": true,
+  "singleQuote": true,
+  "trailingComma": "es5",
+  "arrowParens": "avoid",
+  "bracketSpacing": true
+}

README.md

@@ -1,5 +1,7 @@
 # mvc: A simple MVC framework with React views
 
+"Have your state and mutate it too"
+
 This framework combines other libraries to provide a Model-View-Controller (MVC) 
 architecture for code in the browser. The key libraries are:
 

config/build.js

@@ -3,18 +3,9 @@ import { build } from "esbuild";
 build({
   entryPoints: ["src/index.js"],
   bundle: true,
+  sourcemap: true,
   format: "esm",
-  outfile: "dist/index.esm.js",
-  write: true,
-  external: ["react", "react-dom"],
-  target: "es2018", // TODO: remove this when aha-app supports esnext.
-});
-
-build({
-  entryPoints: ["src/index.js"],
-  bundle: true,
-  format: "cjs",
-  outfile: "dist/index.cjs.js",
+  outfile: "dist/index.js",
   write: true,
   external: ["react", "react-dom"],
   target: "es2018", // TODO: remove this when aha-app supports esnext.