fixed sending form data

Author: Florian

tls_client/__version__.py

@@ -6,6 +6,6 @@
 
 __title__ = "tls_client"
 __description__ = "Advanced Python HTTP Client."
-__version__ = "0.1.7"
+__version__ = "0.1.8"
 __author__ = "Florian Zager"
 __license__ = "MIT"

tls_client/sessions.py

@@ -269,6 +269,7 @@ def execute_request(
                 # check if all header keys and values are strings
                 if type(header_key) is str and type(header_value) is str:
                     self.headers[header_key] = header_value
+                headers = self.headers
         else:
             headers = self.headers