Bump getopts from 0.2.17 to 0.2.18

[dependabot-preview]

Bumps getopts from 0.2.17 to 0.2.18.

Release notes

Sourced from getopts's releases.

0.2.18

Key Changes

• Adds a Matches::opt_get method that can convert a match to any T: FromStr. This should be useful for easily getting matched values as numbers
• Fixes some long-standing issues around text alignment
• Specifies a minimum version policy

Changes to minimum Rust

The minimum version of Rust required has been set at 1.18.0. We may change this in patch versions, but will always flag it in the release notes here.

You can always check the .travis.yml file to see the current minimum supported version.

New Dependencies

• unicode-width for correctly splitting descriptions across multiple lines.

Contributions

• RazrFalcon Added note about a minimum version
• bgermann Update log
• prataprc test case to check opt_present() panic for undefined options
• prataprc implement opt_get() method call on Matches
• prataprc use unicode-width instead of len() or grapheme cluster

Commits

• a718feb Merge pull request #74 from rust-lang-nursery/cargo/0.2.18
• 0300e1a prepare for 0.2.18 release
• 768eccf Merge pull request #70 from prataprc/opt_get
• 4976a82 Merge pull request #71 from prataprc/issue_7
• 26ddb4c Include opt_get_default variant.
• 14648ff implement opt_get() method call on Matches.
• 27df9b2 more optimizations for issue #7.
• 547e4d5 optimize parsing words in each_split_within(), issue #7.
• 7e37bd7 for_each is not implemented until 1.21, issue #7.
• 9973a6c move unicode-width from [dev-dependencies] to [dependencies] issue #7.
• Additional commits viewable in compare view

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[alexcrichton]

@dependabot-bot merge

[dependabot-preview]

OK, I'll merge this once your CI passes on it.