Roll back requirements to python 3.5

requirements.txt

@@ -1,34 +1,13 @@
-aiohttp==3.7.3
-appdirs==1.4.3
+aiohttp==3.6.3
 async-timeout==3.0.1
 attrs==20.3.0
-CacheControl==0.12.6
-certifi==2019.11.28
 chardet==3.0.4
-colorama==0.4.3
-contextlib2==0.6.0
-decorator==4.4.2
-distlib==0.3.0
-distro==1.4.0
-html5lib==1.0.1
-idna==2.8
-ipaddr==2.2.0
-lockfile==0.12.2
-msgpack==0.6.2
-multidict==5.1.0
-packaging==20.3
-pep517==0.8.2
-progress==1.5
+idna==3.1
+idna-ssl==1.1.0
+multidict==4.7.6
 pyaes==1.6.1
 pyasn1==0.4.8
-pyparsing==2.4.6
-pytoml==0.1.21
-requests==2.22.0
-retrying==1.3.3
-rsa==4.7.1
-six==1.14.0
-Telethon==1.19.5
+rsa==4.7.2
+Telethon==1.21.1
 typing-extensions==3.7.4.3
-urllib3==1.25.8
-webencodings==0.5.1
-yarl==1.6.3
+yarl==1.5.1