Update requirements system and removed poetry

Author: Taaku18

Pipfile

@@ -3,31 +3,27 @@ name = "pypi"
 url = "https://pypi.org/simple"
 verify_ssl = true
 
-[[source]]
-name = "pypi"
-url = "https://pypi.org/simple"
-verify_ssl = true
-
 [dev-packages]
-black = "==19.10b0"
-pylint = "*"
-bandit = "==1.6.2"
-flake8 = "*"
+black = "==21.6b0"
+pylint = "~=2.9.3"
+bandit = "~=1.7.0"
+flake8 = "~=3.9.2"
 
 [packages]
-colorama = ">=0.4.0"
-python-dateutil = ">=2.7.0"
-emoji = ">=0.2"
-uvloop = {version = ">=0.12.0",sys_platform = "!= 'win32'"}
-motor = ">=2.0.0"
-natural = "==0.2.0"
-isodate = ">=0.6.0"
-dnspython = "~=1.16.0"
-parsedatetime = "==2.6"
-aiohttp = ">=3.6.0,<3.7.0"
-python-dotenv = ">=0.10.3"
-pipenv = "*"
-"discord.py" = "==1.6.0"
+colorama = "~=0.4.4"
+python-dateutil = "~=2.8.1"
+emoji = "~=1.2.0"
+uvloop = {version = ">=0.15.2",sys_platform = "!= 'win32'"}
+motor = "~=2.4.0"
+natural = "~=0.2.0"
+isodate = "~=0.6.0"
+parsedatetime = "~=2.6"
+aiohttp = "==3.7.4.post0"
+python-dotenv = ">=0.18.0"
+"discord.py" = "==1.7.3"
 
 [scripts]
 bot = "python bot.py"
+
+[requires]
+python_version = "3.9"