bump version to 0.9.0

Nomad node drain 0.8 (jrxFive#54)

* add exception for InvalidParameters add functionality for drain_node_with_spec and purge_node. Remove 3.3 and add 3.6 python versions to test against

bump version

new features, stats endpoint, metrics endpoint, env_vars

bump patch version for exception fix

bump version

Merge pull request jrxFive#37 from jrxFive/cert_tuple

add optional parameter for cert tuple

0.6.0 changes add validation and deployments, regression check (jrxFi…

…ve#34)

* 0.6.0 changes add validation and deployments

bump version

added https option to add CA file for session requests

Merge pull request jrxFive#29 from jcua/add_https_support

Add https support

Merge pull request jrxFive#28 from jrxFive/add_operator_endpoint

add operator endpoint and job/summary and job/plan for jrxFive#27