chore(deps): bump meta from 1.12.0 to 1.15.0 in /sheet

[dependabot]

Bumps meta from 1.12.0 to 1.15.0.

Changelog

Sourced from meta's changelog.

1.15.0 - 2016-03-09

Core library changes

• dart:async

  • Made StreamView class a const class.

• dart:core

  • Added Uri.queryParametersAll to handle multiple query parameters with the same name.

• dart:io

  • Added SecurityContext.usePrivateKeyBytes, SecurityContext.useCertificateChainBytes, SecurityContext.setTrustedCertificatesBytes, and SecurityContext.setClientAuthoritiesBytes.
  • Breaking The named directory argument of SecurityContext.setTrustedCertificates has been removed.
  • Added support to SecurityContext for PKCS12 certificate and key containers.
  • All calls in SecurityContext that accept certificate data now accept an optional named parameter password, similar to SecurityContext.usePrivateKeyBytes, for use as the password for PKCS12 data.

Tool changes

• Dartium and content shell

  • The Chrome-based tools that ship as part of the Dart SDK - Dartium and content shell - are now based on Chrome version 45 (instead of Chrome 39).
  • Dart browser libraries (dart:html, dart:svg, etc) have not been updated.
    • These are still based on Chrome 39.
    • These APIs will be updated in a future release.
  • Note that there are experimental APIs which have changed in the underlying browser, and will not work with the older libraries. For example, Element.animate.

• dartfmt - upgraded to v0.2.4

  • Better handling for long collections with comments.
  • Always put member metadata annotations on their own line.
  • Indent functions in named argument lists with non-functions.
  • Force the parameter list to split if a split occurs inside a function-typed parameter.
  • Don't force a split for before a single named argument if the argument itself splits.

... (truncated)

Commits

• 089e1ba Add codeOffset/codeLength properties to ElementImpl.
• 02f8887 fix ResolutionCopier to copy staticInvokeType/propagatedInvokeType
• 1226c38 fix ResolutionCopier.visitAdjacentStrings
• 9ea1718 Add @​overrides to (a lot of) analyzer.
• ff6a744 Implement forwards compatibility for summary enums.
• 9a983bc Add the ability to deprecate Flatbuffer fields.
• d223676 Fix @​override quick-fix to respect doc comments.
• 841f8e6 Move shouldFileBeAnalyzed into ContextManager
• 92176ad Add major and minor version numbers to summary files.
• e225e61 Issue 25827. Don't propose to remove the type of an incomplete variable decla...
• Additional commits viewable in compare view

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[dependabot]

Superseded by #455.