Fix relative import error on import __version__

This commit fixes the following error discovered
when trying to run the latest executable:

File "codecov_cli/main.py", line 23, in <module>
ImportError: attempted relative import with no known parent package

Signed-off-by: joseph-sentry <joseph.sawaya@sentry.io>

Author: joseph-sentry

codecov_cli/main.py

@@ -4,6 +4,7 @@
 
 import click
 
+from codecov_cli import __version__
 from codecov_cli.commands.base_picking import pr_base_picking
 from codecov_cli.commands.commit import create_commit
 from codecov_cli.commands.create_report_result import create_report_results
@@ -20,8 +21,6 @@
 from codecov_cli.helpers.logging_utils import configure_logger
 from codecov_cli.helpers.versioning_systems import get_versioning_system
 
-from . import __version__
-
 logger = logging.getLogger("codecovcli")