Add new game "brain-prime"

Author: kirillmarkeyev

package.json

@@ -8,7 +8,8 @@
     "brain-even": "bin/brain-even.js",
     "brain-calc": "bin/brain-calc.js",
     "brain-gcd": "bin/brain-gcd.js",
-    "brain-progression": "bin/brain-progression.js"
+    "brain-progression": "bin/brain-progression.js",
+    "brain-prime": "bin/brain-prime.js"
   },
   "main": "index.js",
   "scripts": {