Revert back to encoding names as output

Now that our dependency package has labelToName() exported, this is easy enough to do. Additionally, in jsdom we always immediately wrap the result in labelToName() anyway, so this will make it easier to consume.

Author: domenic

README.md

@@ -12,11 +12,11 @@ const sniffedEncoding = htmlEncodingSniffer(htmlBytes);
 
 The passed bytes are given as a `Uint8Array`; the Node.js `Buffer` subclass of `Uint8Array` will also work, as shown above.
 
-The returned value will be an [encoding label](https://encoding.spec.whatwg.org/#names-and-labels), and in particular, the label which is a lowercased version of the encoding's name. You might then combine this with the [`@exodus/bytes`](https://github.com/ExodusOSS/bytes/) package to decode the result:
+The returned value will be a canonical [encoding name](https://encoding.spec.whatwg.org/#names-and-labels) (not a label). You might then combine this with the [`@exodus/bytes`](https://github.com/ExodusOSS/bytes/) package to decode the result:
 
 ```js
 const { TextDecoder } = require("@exodus/bytes");
-const htmlString = (new TextEncoder(sniffedEncoding)).decode(htmlBytes);
+const htmlString = (new TextDecoder(sniffedEncoding)).decode(htmlBytes);
 ```
 
 ## Options

lib/html-encoding-sniffer.js

@@ -1,9 +1,9 @@
 "use strict";
-const { getBOMEncoding, normalizeEncoding: labelToName } = require("@exodus/bytes/encoding-lite.js");
+const { getBOMEncoding, labelToName } = require("@exodus/bytes/encoding-lite.js");
 
 // https://html.spec.whatwg.org/#encoding-sniffing-algorithm
 module.exports = (uint8Array, { transportLayerEncodingLabel, defaultEncoding = "windows-1252" } = {}) => {
-  let encoding = getBOMEncoding(uint8Array);
+  let encoding = labelToName(getBOMEncoding(uint8Array));
 
   if (encoding === null && transportLayerEncodingLabel !== undefined) {
     encoding = labelToName(transportLayerEncodingLabel);
@@ -86,8 +86,8 @@ function prescanMetaCharset(uint8Array) {
           continue;
         }
 
-        if (charset === "utf-16le" || charset === "utf-16be") {
-          charset = "utf-8";
+        if (charset === "UTF-16LE" || charset === "UTF-16BE") {
+          charset = "UTF-8";
         }
         if (charset === "x-user-defined") {
           charset = "windows-1252";

package-lock.json

@@ -21,7 +21,7 @@
     "lint": "eslint"
   },
   "dependencies": {
-    "@exodus/bytes": "^1.2.0"
+    "@exodus/bytes": "^1.6.0"
   },
   "devDependencies": {
     "@domenic/eslint-config": "^4.0.1",