Update maximum version of intelhex to 2.3.0

[ladislas]

Summary of changes

Update minimum version of intelhex to 2.3.0.

Impact of changes

On macOS with Python 3.9.1, using intelhex in a script results in the following error:

  File "/Users/ladislas/Library/Python/3.9/lib/python/site-packages/intelhex/__init__.py", line 44, in <module>
    from intelhex.compat import (
  File "/Users/ladislas/Library/Python/3.9/lib/python/site-packages/intelhex/compat.py", line 60, in <module>
    array_tobytes = getattr(array.array, "tobytes", array.array.tostring)
AttributeError: type object 'array.array' has no attribute 'tostring'

The issue is well known, see:

python-intelhex/intelhex#45

With 2.3.0, the issue is fixed.

Migration actions required

none

Documentation

n/a

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Pull request type

[x] Patch update (Bug fix / Target update / Docs update / Test update / Refactor)
[] Feature update (New feature / Functionality change / New API)
[] Major update (Breaking change E.g. Return code change / API behaviour change)

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Test results

[x] No Tests required for this change (E.g docs only update)
[] Covered by existing mbed-os tests (Greentea or Unittest)
[] Tests / results supplied as part of this PR

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Reviewers

@0xc0170 @rwalton-arm @Patater (might be related to ARMmbed/mbed-tools#171)

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[rwalton-arm]

Can we remove the maximum version? I'd rather keep it "unpinned" so we don't have to update it again at some point in the future.

[ladislas]

I'm happy to do that! Should I also remove the minimum version or should I put 2.3.0?

[ciarmcom]

@ladislas, thank you for your changes.
@0xc0170 @Patater @rwalton-arm @ARMmbed/mbed-os-maintainers please review.

[ciarmcom]

This pull request has automatically been marked as stale because it has had no recent activity. @ARMmbed/mbed-os-maintainers, please start CI to get the PR merged.

[0xc0170]

CI started

[mbed-ci]

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