Use full github URL for branch to avoid hanging node 14 install

Author: ericyhwang

package.json

@@ -6,7 +6,7 @@
   "dependencies": {
     "async": "^2.6.3",
     "mongodb": "^2.1.2 || ^3.1.13 || ^4.0.0",
-    "sharedb": "share/sharedb#debug-test-mongo-double-done"
+    "sharedb": "https://github.com/share/sharedb#debug-test-mongo-double-done"
   },
   "devDependencies": {
     "chai": "^4.2.0",