Release dev, dev-test and dev-ts together as 0.86.8

Carries the browser environment fixes: JSDOM's WebSocket and the location
global, which an ApiPromise against a live node needs in a browser-env spec.
Also the build import check that accepts every node: builtin. dev depends on
^0.86.8 of the other two.

packages/dev-test/package.json

@@ -15,7 +15,7 @@
   },
   "sideEffects": false,
   "type": "module",
-  "version": "0.86.7",
+  "version": "0.86.8",
   "main": "./index.js",
   "exports": {
     "./globals.d.ts": "./src/globals.d.ts"