meta: bump version to 2.0.0

Commits:

[ 1dd596f ] - src:
descope global variables (Ravali Yatham) #15

[ de7401b ] - src:
fix circular structure detection (Ravali Yatham) #17

[ abbfd9a ] - build:
bump eslint from 3.19.0 to 6.6.0 (dependabot) #20

[ 682e56a ] - src:
parse exponential numbers (Anton Kudinov) #21

PR-URL: #23
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "yieldable-json",
-  "version": "1.1.0",
+  "version": "2.0.0",
   "main": "index.js",
   "description": "An asynchronous yieldable version of JSON.stringify and JSON.parse",
   "author": "Gireesh Punathil <gpunathi@in.ibm.com>",