Updates the engines contraint in package.json, updates the test versions for travis

Author: mihai-vlc

.travis.yml

@@ -1,6 +1,9 @@
 language: node_js
 
 node_js:
-    - "8.9"
+    - "9"
+    - "10"
+    - "11"
+    - "12"
 
 script: npm run test:verbose

package.json

@@ -1,7 +1,7 @@
 {
   "name": "verbal-expressions",
   "description": "JavaScript Regular expressions made easy",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "keywords": [
     "regular expressions",
     "regex"
@@ -46,7 +46,7 @@
   },
   "types": "./typings/VerbalExpressions.d.ts",
   "engines": {
-    "node": "^9.2.0"
+    "node": ">=9.2.0"
   },
   "dependencies": {}
 }