Remove Elasticsearch from engines

According to the [docs](https://docs.npmjs.com/files/package.json#engines) only node and NPM versions may be specified here.
9 years ago · 5293e96929
1 changed files with 1 additions and 2 deletions
--- a/package.json
+++ b/package.json
@ -31,8 +31,7 @@
  },
  "engines": {
    "node": ">=0.10.26",
-    "npm": ">=1.4.3",
-    "elasticsearch": ">=1.2.1"
+    "npm": ">=1.4.3"
  },
  "dependencies": {
    "async": "^1.5.2",