Make Python 3.5 support mergeable to master

requirements/3.5.txt

@@ -0,0 +1,2 @@
+-r base.txt
+-e git+https://github.com/tulir/Telethon@asyncio-3.5#egg=Telethon

requirements/base.txt

@@ -3,7 +3,6 @@ ruamel.yaml
 python-magic
 SQLAlchemy
 alembic
--e git+https://github.com/tulir/Telethon@asyncio-3.5#egg=Telethon
 Markdown
 Pillow
 future-fstrings

requirements/default.txt

@@ -0,0 +1,2 @@
+-r base.txt
+-e git+https://github.com/LonamiWebs/Telethon@asyncio#egg=Telethon

setup.py

@@ -1,4 +1,5 @@
 import setuptools
+import sys
 import mautrix_telegram
 
 setuptools.setup(
@@ -25,7 +26,10 @@ setuptools.setup(
         "python-magic>=0.4.15,<0.5",
     ],
     dependency_links=[
-        "https://github.com/tulir/Telethon/tarball/ac46abc9680c5a74897fe6dbe9e585ad2577b1fa#egg=Telethon"
+        (
+            "https://github.com/LonamiWebs/Telethon/tarball/7da092894b306d720cc60c04daa2bfba58f81946#egg=Telethon"
+            if sys.version_info.major > 3 or sys.version_info.minor > 6
+            else "https://github.com/tulir/Telethon/tarball/ac46abc9680c5a74897fe6dbe9e585ad2577b1fa#egg=Telethon")
     ],
 
     classifiers=[