Add Object.entries/fromEntries node6 support.

Author: davidlehn

lib/index.js

@@ -5,8 +5,15 @@
  *
  * Copyright 2010-2017 Digital Bazaar, Inc.
  */
+// FIXME: remove after change to core-js 3 and dropping node6 support
+const fromEntries = require('object.fromentries');
+if(!Object.fromEntries) {
+  fromEntries.shim();
+}
+
 if(require('semver').gte(process.version, '8.6.0')) {
   module.exports = require('./jsonld');
 } else {
+  require('core-js/fn/object/entries');
   module.exports = require('../dist/node6/lib/jsonld');
 }

package.json

@@ -32,6 +32,7 @@
   "dependencies": {
     "canonicalize": "^1.0.1",
     "lru-cache": "^5.1.1",
+    "object.fromentries": "^2.0.2",
     "rdf-canonize": "^1.0.2",
     "request": "^2.88.0",
     "semver": "^6.3.0",