Upgrade discord.py to v1.5

Update fernuni-bot.py to use intents, which are required for discord.py v1.5

fernuni-bot.py

@@ -25,7 +25,9 @@ DATE_TIME_FORMAT = os.getenv("DISCORD_DATE_TIME_FORMAT")
 CATEGORY_LERNGRUPPEN = os.getenv("DISCORD_CATEGORY_LERNGRUPPEN")
 
 PIN_EMOJI = "📌"
-bot = commands.Bot(command_prefix='!', help_command=None, activity=discord.Game(ACTIVITY), owner_id=OWNER)
+intents = discord.Intents.default()
+intents.members = True
+bot = commands.Bot(command_prefix='!', help_command=None, activity=discord.Game(ACTIVITY), owner_id=OWNER, intents=intents)
 appointments_cog = AppointmentsCog(bot, DATE_TIME_FORMAT, APPOINTMENTS_FILE)
 text_commands_cog = TextCommandsCog(bot, TEXT_COMMANDS_FILE)
 bot.add_cog(appointments_cog)

requirements.txt

-aiohttp==3.6.2
+aiohttp==3.6.3
 async-timeout==3.0.1
-attrs==19.3.0
+attrs==20.2.0
 chardet==3.0.4
 discord==1.0.1
-discord.py==1.3.4
-idna==2.9
-multidict==4.7.5
-python-dotenv==0.12.0
+discord.py==1.5.0
+idna==2.10
+multidict==5.0.0
+python-dotenv==0.14.0
 websockets==8.1
-yarl==1.4.2
+yarl==1.6.2