Switch to nanohtml (#644)

html/index.d.ts

@@ -1,2 +1,2 @@
-import * as bel from "bel"
-export = bel
+import * as nanohtml from "nanohtml"
+export = nanohtml

html/index.js

@@ -1 +1 @@
-module.exports = require('bel')
+module.exports = require('nanohtml')

html/raw.js

@@ -1 +1 @@
-module.exports = require('bel/raw')
+module.exports = require('nanohtml/raw')