Merge branch 'master' into all-contributors/add-hoangnam2261

# Conflicts:
#	.all-contributorsrc
#	README.md

.all-contributorsrc

@@ -291,6 +291,15 @@
         "code"
       ]
     },
+    {
+      "login": "akrystian",
+      "name": "adamski.pro",
+      "avatar_url": "https://avatars1.githubusercontent.com/u/6537430?v=4",
+      "profile": "http://adamski.pro",
+      "contributions": [
+        "code"
+      ]
+    },
     {
       "login": "baislsl",
       "name": "Shengli Bai",

README.md

@@ -178,6 +178,7 @@ This project is licensed under the terms of the MIT license.
   </tr>
   <tr>
     <td align="center"><a href="https://github.com/baislsl"><img src="https://avatars0.githubusercontent.com/u/17060584?v=4" width="100px;" alt=""/><br /><sub><b>Shengli Bai</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=baislsl" title="Code">💻</a></td>
+    <td align="center"><a href="http://adamski.pro"><img src="https://avatars1.githubusercontent.com/u/6537430?v=4" width="100px;" alt=""/><br /><sub><b>adamski.pro</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=akrystian" title="Code">💻</a></td>
   </tr>
   <tr>
   </tr>