Feat(other): add support for custom request headers

Add support for custom request headers

ISSUES CLOSED: #2
1 job for http-headers in 3 minutes and 57 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
failed #1023
test

00:03:57

 
Name Stage Failure
failed
test Test
ERROR tests/test_gremlin_python/process/test_strategies.py::TestTraversalStrategies::test_singletons
ERROR tests/test_gremlin_python/process/test_strategies.py::TestTraversalStrategies::test_configurable
ERROR tests/test_gremlin_python/process/test_traversal.py::TestTraversal::test_bytecode
ERROR tests/test_gremlin_python/process/test_traversal.py::TestTraversal::test_P
ERROR tests/test_gremlin_python/process/test_traversal.py::TestTraversal::test_anonymous_traversal
================= 378 warnings, 42 errors in 214.82s (0:03:34) =================
/usr/local/lib/python3.8/site-packages/pep8.py:110: FutureWarning: Possible nested set at position 1
EXTRANEOUS_WHITESPACE_REGEX = re.compile(r'[[({] | []}),;:]')
ERROR: Job failed: exit code 1