replace jest with ava

node_modules/merge-stream/index.js

@@ -1,41 +0,0 @@
-'use strict';
-
-const { PassThrough } = require('stream');
-
-module.exports = function (/*streams...*/) {
-  var sources = []
-  var output  = new PassThrough({objectMode: true})
-
-  output.setMaxListeners(0)
-
-  output.add = add
-  output.isEmpty = isEmpty
-
-  output.on('unpipe', remove)
-
-  Array.prototype.slice.call(arguments).forEach(add)
-
-  return output
-
-  function add (source) {
-    if (Array.isArray(source)) {
-      source.forEach(add)
-      return this
-    }
-
-    sources.push(source);
-    source.once('end', remove.bind(null, source))
-    source.once('error', output.emit.bind(output, 'error'))
-    source.pipe(output, {end: false})
-    return this
-  }
-
-  function isEmpty () {
-    return sources.length == 0;
-  }
-
-  function remove (source) {
-    sources = sources.filter(function (it) { return it !== source })
-    if (!sources.length && output.readable) { output.end() }
-  }
-}