Patch wasm-pack bundler target for Cloudflare Workers

Following Cloudflare's documentation found here:
https://developers.cloudflare.com/workers/languages/rust/#javascript-plumbing-wasm-bindgen

Fixes #156

Author: rmarscher

minify-html-wasm/build

@@ -14,6 +14,8 @@ if [[ "$target" = "bundler" ]]; then
   jq -s '.[0] * .[1]' package.json ../package.merge.json > package.new.json
   mv package.new.json package.json
   rm .gitignore
+  # https://developers.cloudflare.com/workers/languages/rust/#javascript-plumbing-wasm-bindgen
+  cp ../index.js index.js
 elif [[ "$target" = "web" ]]; then
   rm package.json .gitignore
 fi

minify-html-wasm/index.js

@@ -0,0 +1,13 @@
+import * as imports from "./index_bg.js"
+
+// switch between both syntax for node and for workerd
+import wkmod from "./index_bg.wasm"
+import * as wasm from "./index_bg.wasm"
+if (typeof process !== "undefined" && process.release.name === "node") {
+  imports.__wbg_set_wasm(wasm)
+} else {
+  const instance = new WebAssembly.Instance(wkmod, { "./index_bg.js": imports })
+  imports.__wbg_set_wasm(instance.exports)
+}
+
+export * from "./index_bg.js"