Bump to 0.3

Author: alex-lairan

spec/monads_spec.cr

@@ -3,6 +3,6 @@ require "./monads/**"
 
 describe Monads do
   it "should have version" do
-    Monads::VERSION.should eq("0.2.0")
+    Monads::VERSION.should eq("0.3.0")
   end
 end

src/monads.cr

@@ -8,5 +8,5 @@ module Monads
   # - Update Readme
   # - Try monad
   # - Task monad
-  VERSION = "0.2.0"
+  VERSION = "0.3.0"
 end