Bump Python version in Quickstart documentation

docs/discord.rst

@@ -42,7 +42,7 @@ Creating a Bot account is a pretty straightforward process.
     .. warning::
 
         It should be worth noting that this token is essentially your bot's
-        password. You should **never** share this to someone else. In doing so,
+        password. You should **never** share this with someone else. In doing so,
         someone can log in to your bot and do malicious things, such as leaving
         servers, ban all members inside a server, or pinging everyone maliciously.
 

docs/faq.rst

@@ -98,7 +98,7 @@ The constructor may be used for static activities, while :meth:`Client.change_pr
     There is a high chance of disconnecting if presences are changed right after connecting.
 
 The status type (playing, listening, streaming, watching) can be set using the :class:`ActivityType` enum.
-For memory optimisation purposes, some activities are offered in slimmed down versions:
+For memory optimisation purposes, some activities are offered in slimmed-down versions:
 
 - :class:`Game`
 - :class:`Streaming`

docs/intro.rst

@@ -13,9 +13,8 @@ in creating applications that utilise the Discord API.
 Prerequisites
 ---------------
 
-discord.py works with Python 3.5.3 or higher. Support for earlier versions of Python
-is not provided. Python 2.7 or lower is not supported. Python 3.4 or lower is not supported
-due to one of the dependencies (:doc:`aiohttp <aio:index>`) not supporting Python 3.4.
+discord.py works with Python 3.8 or higher. Support for earlier versions of Python
+is not provided. Python 2.7 or lower is not supported. Python 3.7 or lower is not supported.
 
 
 .. _installing: