Run tests on more node and sinon versions

Author: Donatas Stundys

.travis.yml

@@ -1,10 +1,12 @@
 language: node_js
 node_js:
-  - 4
+  - 6
+  - 8
+  - 9
+  - 10
   - stable
 env:
-  # This matrix used to be larger. In 3.0.0 we moved to only supporting these versions.
-  # But, we'll retain the infrastructure for a larger matrix, in case we need it in the future.
+  - CHAI_VERSION=^4.0.0 SINON_VERSION=^5.0.0
   - CHAI_VERSION=^4.0.0 SINON_VERSION=^4.0.0
 script:
   - npm run lint

package-lock.json

@@ -23,13 +23,13 @@
   ],
   "scripts": {
     "test": "mocha",
-    "test-travis": "npm install chai@$CHAI_VERSION && npm install sinon@$SINON_VERSION && npm install && npm test",
+    "test-travis": "npm install && npm install chai@$CHAI_VERSION && npm install sinon@$SINON_VERSION && npm test",
     "lint": "eslint .",
     "cover": "istanbul cover node_modules/mocha/bin/_mocha && opener ./coverage/lcov-report/lib/sinon-chai.js.html"
   },
   "peerDependencies": {
     "chai": "^4.0.0",
-    "sinon": "^4.0.0 || ^5.0.0"
+    "sinon": ">=4.0.0"
   },
   "devDependencies": {
     "chai": "^4.1.0",