Codecov crashes on Semaphore build due to missing env var SEMAPHORE_BUILD_NUMBER

[Helveg]

Running

pip install codecov
codecov

on Semaphore CI fails with the following error:

Traceback (most recent call last):
--
  | File "/home/semaphore/.pyenv/3.7/bin/codecov", line 8, in <module>
  | sys.exit(main())
  | File "/home/semaphore/.pyenv/3.7/lib/python3.7/site-packages/codecov/__init__.py", line 365, in main
  | build=os.getenv('SEMAPHORE_BUILD_NUMBER') + '.' + os.getenv('SEMAPHORE_CURRENT_THREAD'),
  | TypeError: unsupported operand type(s) for +: 'NoneType' and 'str'
  | exit code: 1 duration: 0s

This is to be expected as SEMAPHORE_BUILD_NUMBER is not listed in the docs. This seems to be a difference between Semaphore 2.0 and Semaphore, where this env var is available.

Is there support for Semaphore 2.0?

[Helveg]

Also important to notice is that the SEMAPHORE env var that is being checked to determine that Semaphore CI is being used, is also set to true if Semaphore 2.0 is being used.