Warnings when used with Python 3.10

[marhoy]

When used with Python 3.10, I get the following warnings:

luigi/target.py:287: DeprecationWarning: non-integer arguments to randrange() have been deprecated since Python 3.10 and will be removed in a subsequent version

luigi/worker.py:161: DeprecationWarning: Seeding based on hashing is deprecated since Python 3.9 and will be removed in a subsequent version.

[alecgarza96]

Instances of randrange found in target.py

[alecgarza96]

Assuming this error is being generated due to the scientific notation being used to represent 10,000,000,000. Will test this out.

[alecgarza96]

For the second warning, it appears the issue lies here:

I wrote some basic test code and was able to successfully replicate and resolve error

[alecgarza96]

Able to replicate second warning with following code

1e10 = ten billion

remedied with following code

[alecgarza96]

#3150

submitted pull request above