Drop py36 testing for Tornado. (#462)

* Drop py36 testing for Tornado.

* Remove pypy3 from tornado test matrix.

Author: umaannamalai

tox.ini

@@ -136,8 +136,7 @@ envlist =
     python-framework_starlette-{py36,py37,py38,py39,py310,pypy3}-starlette{latest},
     python-framework_strawberry-{py37,py38,py39,py310}-strawberrylatest,
     libcurl-framework_tornado-{py36,py37,py38,py39,py310,pypy3}-tornado0600,
-    ; Temp disable until other PR
-    ; libcurl-framework_tornado-{py36,py37,py38,py39,py310,pypy3}-tornadomaster,
+    libcurl-framework_tornado-{py37,py38,py39,py310}-tornadomaster,
     rabbitmq-messagebroker_pika-{py27,py36,py37,py38,py39,pypy,pypy3}-pika0.13,
     rabbitmq-messagebroker_pika-{py27,py36,py37,py38,py39,py310,pypy,pypy3}-pikalatest,
     python-template_mako-{py27,py36,py37,py38,py39,py310}