Bump bibtex-ruby from 4.4.7 to 5.1.0

[dependabot[bot]]

Bumps bibtex-ruby from 4.4.7 to 5.1.0.

Changelog

Sourced from bibtex-ruby's changelog.

5.1.0 / 2020-01-17

• Use File.read instead of Kernel.open in BibTeX.open
• Fix Ruby 2.7 deprecation warnings

5.0.0 / 2019-06-12

• Dropped support for Ruby < 2.3

4.2.0 / 2015-02-02

• Fixed queries being whitespace sensitive

4.0.9 / 2015-01-20

• Improve BibTeX::Value comparison

4.0.8 / 2015-01-12

• Ruby 2.2 support
• Added Entry#month_numeric
• Added support for numeric values

4.0.4 / 2014-10-10

• added !~ matcher for queries (@temporaer)

4.0.0 / 2014-07-08

• BREAKING: Support type/key fields. Rename type -> bibtex_type and key -> bibtex_key in key-value exports.
• Add support for BibLaTeX date syntax

3.1.6 / 2014-06-17

• Allow semicolons in keys
• Bugfixes

3.1.5 / 2014-03-25

• Improve Name#extend_initials
• Add Name#normalize_initials

3.1.4 / 2014-03-15

• Add more name fields

... (truncated)

Commits

• 3a32242 5.1.0
• d514c73 Bumbp coveralls gem
• e22c1fc Update rdf gems
• 743f3b3 Add Ruby 2.7
• d2938f4 Bump dependencies
• 14406f4 Use File.read instead of Kernel.open
• 707b930 5.0.1
• 480abb0 Fix greater/less than queries for strings
• 0933d32 Update bundle
• 2c55364 Add more query examples
• Additional commits viewable in compare view

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