Update tcxreader requirement from ~=0.4.6 to ~=0.4.9

[dependabot[bot]]

Updates the requirements on tcxreader to permit the latest version.

Release notes

Sourced from tcxreader's releases.

v0.4.9

• Updated Readme
• Fixed reading error with missing HR data values
• Fixed value conversion error in cadence
• New feature: Linear interpolation is now supported for missing values. See readme for details.

Commits

• 1fbfa13 Update CHANGELOG.md
• 1e1d226 Bugfix for older python versions
• 1265990 Merge branch 'main' of https://github.com/alenrajsp/tcxreader
• b3e5a9a New feature and bugfix
• 71035bb Merge pull request #48 from alenrajsp/all-contributors/add-simonpickering
• a59b719 Merge branch 'main' into all-contributors/add-simonpickering
• 064522a Merge pull request #49 from alenrajsp/all-contributors/add-rwinklerwilkes
• fcb9b2a docs: update .all-contributorsrc [skip ci]
• 03df5e3 docs: update README.md [skip ci]
• 6832d97 docs: update .all-contributorsrc [skip ci]
• Additional commits viewable in compare view

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