Update README and add aiohttp dependency

aiohttp has a weird issue when installing with pipenv. A workaround is
added in the README.md to at least cover that case when it comes time to
deploy on a real server.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

Pipfile

@@ -7,6 +7,7 @@ name = "pypi"
 async-irc = "*"
 toml = {version="*", markers="python_version < '3.11'"}
 types-toml = "*"
+"aiohttp[speedups]" = "*"
 
 [dev-packages]
 mypy = "*"