minor: semantic-release now controls the package.json version

now that we use semantic-release and it pulls the latest git tag, we
should not have an actual version in the package.json

package.json

@@ -1,6 +1,6 @@
 {
   "name": "social-insurance-number",
-  "version": "0.0.3",
+  "version": "0.0.0-development",
   "description": "Canadian SIN (Social Insurance Number) parser and generator",
   "main": "social-insurance-number.js",
   "scripts": {