Set the mruby-1.4.0 release date to `2018-1-16`.

MITL

-Copyright (c) 2017 mruby developers
+Copyright (c) 2018 mruby developers
 
 Permission is hereby granted, free of charge, to any person obtaining a
 copy of this software and associated documentation files (the "Software"),

README.md

@@ -17,7 +17,7 @@ of the Ministry of Economy, Trade and Industry of Japan.
 
 ## How to get mruby
 
-The stable version 1.3.0 of mruby can be downloaded via the following URL: [https://github.com/mruby/mruby/archive/1.3.0.zip](https://github.com/mruby/mruby/archive/1.3.0.zip)
+The stable version 1.4.0 of mruby can be downloaded via the following URL: [https://github.com/mruby/mruby/archive/1.4.0.zip](https://github.com/mruby/mruby/archive/1.4.0.zip)
 
 The latest development version of mruby can be downloaded via the following URL: [https://github.com/mruby/mruby/zipball/master](https://github.com/mruby/mruby/zipball/master)
 

doc/guides/debugger.md

@@ -38,7 +38,7 @@ To confirm mrdb was installed properly, run mrdb with the `--version` option:
 
 ```bash
 $ mrdb --version
-mruby 1.3.0 (2017-7-4)
+mruby 1.4.0 (2018-1-16)
 ```
 
 ## 2.2 Basic Operation

doc/limitations.md

@@ -38,7 +38,7 @@ puts [1,2,3]
 3
 ```
 
-#### mruby [1.3.0 (2017-7-4)]
+#### mruby [1.4.0 (2018-1-16)]
 
 ```
 [1, 2, 3]
@@ -61,7 +61,7 @@ end
 
 ```ZeroDivisionError``` is raised.
 
-#### mruby [1.3.0 (2017-7-4)]
+#### mruby [1.4.0 (2018-1-16)]
 
 No exception is raised.
 
@@ -89,7 +89,7 @@ p Liste.new "foobar"
 
 ``` [] ```
 
-#### mruby [1.3.0 (2017-7-4)]
+#### mruby [1.4.0 (2018-1-16)]
 
 ```ArgumentError``` is raised.
 
@@ -119,7 +119,7 @@ false
 true
 ```
 
-#### mruby [1.3.0 (2017-7-4)]
+#### mruby [1.4.0 (2018-1-16)]
 
 ```
 true
@@ -142,7 +142,7 @@ defined?(Foo)
 nil
 ```
 
-#### mruby [1.3.0 (2017-7-4)]
+#### mruby [1.4.0 (2018-1-16)]
 
 ```NameError``` is raised.
 
@@ -159,7 +159,7 @@ alias $a $__a__
 
 ``` nil ```
 
-#### mruby [1.3.0 (2017-7-4)]
+#### mruby [1.4.0 (2018-1-16)]
 
 Syntax error
 
@@ -181,7 +181,7 @@ end
 ```ArgumentError``` is raised.
 The re-defined ```+``` operator does not accept any arguments.
 
-#### mruby [1.3.0 (2017-7-4)]
+#### mruby [1.4.0 (2018-1-16)]
 
 ``` 'ab' ```
 Behavior of the operator wasn't changed.

include/mruby.h

 /*
 ** mruby - An embeddable Ruby implementation
 **
-** Copyright (c) mruby developers 2010-2017
+** Copyright (c) mruby developers 2010-2018
 **
 ** Permission is hereby granted, free of charge, to any person obtaining
 ** a copy of this software and associated documentation files (the

include/mruby/version.h

@@ -42,7 +42,7 @@ MRB_BEGIN_DECL
 /*
  * Minor release version number.
  */
-#define MRUBY_RELEASE_MINOR 3
+#define MRUBY_RELEASE_MINOR 4
 
 /*
  * Tiny release version number.
@@ -62,17 +62,17 @@ MRB_BEGIN_DECL
 /*
  * Release year.
  */
-#define MRUBY_RELEASE_YEAR 2017
+#define MRUBY_RELEASE_YEAR 2018
 
 /*
  * Release month.
  */
-#define MRUBY_RELEASE_MONTH 7
+#define MRUBY_RELEASE_MONTH 1
 
 /*
  * Release day.
  */
-#define MRUBY_RELEASE_DAY 4
+#define MRUBY_RELEASE_DAY 16
 
 /*
  * Release date as a string.