Fix SyntaxWarning and upgrade python version for testing

• Fixes SyntaxWarning: "is" with a literal. Did you mean "=="? warning for python3.8+.
• Upgrade the Python version used for testing.

Add python3 support to pypi classifiers and remove deprecated tag from travis yaml

Merge pull request #61 from cabhishek/fix_travis_config

Fix travis config

Improve presto semicolon logic

Merge pull request #58 from cabhishek/fix_presto_semicolon

Improve presto semicolon logic

Stricter response code check

• Check the status code if the response is None when fetching stderr

Handle 416 response code from genie server

• Don't error when getting a 416 response code when reading logs

Fix deprecation warnings from inspect module

• Use getfullargspec frominspect module for py3.

v3.6.11: Merge pull request #54 from cabhishek/genie_headers

• Pipe kwargs from execute method all the down to the request call

v3.6.10

Add genie 4 job status to running job list.

Force release

Merge pull request #51 from cabhishek/master

Handle `is_file` error gracefully

v3.6.8

• Handle is_file error gracefully