Bump metar from 1.6.0 to 1.7.0

[dependabot-preview[bot]]

Bumps metar from 1.6.0 to 1.7.0.

Release notes

Sourced from metar's releases.

python-metar 1.7.0 release

This release is a bug fix and enhancement release with no known API breakages. The highlights include:

• #77 Support was added for I-group (ice accretion), see new Metar attributes ice_accretion_1hr, ice_accretion_3hr, and ice_accretion_6hr.
• #70 Code tests were migrated to pytest.
• #64 Cloud type AC is now supported.
• A number of pull requests were merged that improved the PEP8 and code style. The project's LICENSE was also clarifed as BSD.

Changelog

Sourced from metar's changelog.

metar-1.7.0 (15 January 2019)

This release is a bug fix and enhancement release with no known API breakages. The highlights include:

• #77 Support was added for I-group (ice accretion), see new Metar attributes ice_accretion_1hr, ice_accretion_3hr, and ice_accretion_6hr.
• #70 Code tests were migrated to pytest.
• #64 Cloud type AC is now supported.
• A number of pull requests were merged that improved the PEP8 and code style. The project's LICENSE was also clarifed as BSD.

Commits

• 2c322a2 Merge pull request #79 from akrherz/release_0_17
• 42569c0 make 1.7.0 release of python-metar
• 464aebb Merge pull request #78 from akrherz/issue77
• 269ae43 support 1,3,6 hour ice accretion
• 47bde0e Merge pull request #73 from akrherz/murcoverage
• 4e62fbd increase Metar test coverage
• 6a67832 Merge pull request #72 from akrherz/stylin
• fa29201 allow getstation.py to work on python2 and python3
• fef9a76 cleanup some imports
• 6190e79 use is None for equality comparison
• Additional commits viewable in compare view

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