fix(api)!: Renaming classes and creating a default package object

A class which provides the ConfigValue Object was not a good deal
Now there's a default package object called configparser which gives a Config(old ConfigValue) object

Author: BrunoSilvaAndrade

pyconfigparser.py

@@ -41,7 +41,7 @@ def values(self):
         return self.__dict__.values()
 
 
-class configparser:
+class Configparser:
     def __init__(self):
         self.__instance = None
         self.__hold_an_instance = True
@@ -145,4 +145,4 @@ def __extract_env_variable_key(self, variable):
         return variable
 
 
-configparser = configparser()
+configparser = Configparser()