improvements

main.js

@@ -1,15 +1,15 @@
 exports.get = function get() { /* istanbul ignore next */
-  if (process.platform === 'darwin') {
-    var release = parseFloat(require('os').release());
+  if (process.platform === "darwin") {
+    var release = parseFloat(require("os").release());
     switch (release) {
-      case 1.3:
-        return "10.0";
-      case 1.4:
-        return "10.1";
-      default:
-        return "10." + Number((release - 4).toFixed(1));
+    case 1.3:
+      return "10.0";
+    case 1.4:
+      return "10.1";
+    default:
+      return "10." + (Number((release - 4).toFixed(1)) - 0.1);
     }
   } else {
-    return 'no Mac OS system';
+    return "no Mac OS system";
   }
 };

package.json

@@ -1,7 +1,7 @@
 {
   "name": "get-osx-version",
-  "version": "1.4.0",
-  "description": "small and tiny program to get your current OS X version",
+  "version": "1.4.1",
+  "description": "small and tiny program to get the current Mac OS version of the system",
   "main": "main.js",
   "scripts": {
     "test": "node test.js",
@@ -15,7 +15,8 @@
   "keywords": [
     "osx",
     "mac",
-    "version"
+    "version",
+    "mac os"
   ],
   "author": "fscherwi",
   "license": "MIT",