refactor: run echo-http-server via aegir

This simplifies code in interface-js-ipfs-core as both Node an Browser
init it the same way

Context:
ipfs-inactive/interface-js-ipfs-core#514 (comment)

License: MIT
Signed-off-by: Marcin Rataj <[email protected]>

Author: lidel

.aegir.js

@@ -37,8 +37,8 @@ module.exports = {
   },
   hooks: {
     node: {
-      pre: (cb) => preloadNode.start(cb),
-      post: (cb) => preloadNode.stop(cb)
+      pre: (cb) => batch('start', cb, preloadNode, httpEchoServer),
+      post: (cb) => batch('stop', cb, preloadNode, httpEchoServer)
     },
     browser: {
       pre: (cb) => batch('start', cb, ipfsdServer, preloadNode, httpEchoServer),

package.json

@@ -193,7 +193,7 @@
     "execa": "^2.0.4",
     "form-data": "^2.5.0",
     "hat": "0.0.3",
-    "interface-ipfs-core": "https://github.com/ipfs/interface-js-ipfs-core/tarball/1fb34d2821a1d4edda4060f3c043297f6d6e0762/interface-js-ipfs-core.tar.gz",
+    "interface-ipfs-core": "https://github.com/ipfs/interface-js-ipfs-core/tarball/a810adfcbb977257851a4be3aae158a350119810/interface-js-ipfs-core.tar.gz",
     "ipfsd-ctl": "^0.43.0",
     "libp2p-websocket-star": "~0.10.2",
     "ncp": "^2.0.0",