Bump flask-rest-jsonapi from 0.30.1 to 0.31.0

Bumps flask-rest-jsonapi from 0.30.1 to 0.31.0.

Commits

• 3ce7482 Bump version to 0.31.0
• be79f13 Merge branch 'master' of github.com:miLibris/flask-rest-jsonapi
• a900250 use main python versions
• bfe9a3d fix marshaling error
• d8772e1 Merge pull request #190 from rubenghio/master
• c106169 Merge pull request #181 from TMiguelT/resource_init_args
• 8ded23d Merge pull request #186 from satwikkansal/master
• f34a12d Merge pull request #177 from TMiguelT/filter-related
• 4c102b8 Merge pull request #172 from TMiguelT/python3
• f4cde00 Merge pull request #169 from dxmo/add_decimal_support
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