Create emails_mert_can_fidan.py

## My Changes
 
I created `Emails` class which satisfies `test_emails.py`. 
 
## Checklist
- [x] I have read [CONTRIBUTING].
- [x] I have performed a self-review of my own code.
- [x] I have run the code locally and it works as explained.
- [x] I have commented my code, particularly in hard-to-understand areas

Author: usrmertc

Week05/emails_mert_can_fidan.py

@@ -0,0 +1,17 @@
+class Emails(list):
+    def __init__(self, data: [str]) -> None:
+        self.data = list(set(data))
+        self.validate(data)
+        
+    def __repr__(self):
+        return f"Emails({self.data})"
+    
+    def __str__(self):
+        return f"Emails: {self.data}"
+        
+    def validate(self, data: [str]) -> None:
+        for email in data:
+            if isinstance(email, int):
+                raise ValueError("Only string values accepted!")
+            if "@" not in email:
+                raise ValueError("This is not an email adress!")