Update sinon requirement from 2.0.0-pre.2 to 7.2.7

[dependabot-preview]

Updates the requirements on sinon to permit the latest version.

Changelog

Sourced from sinon's changelog.

7.2.7 / 2019-03-04

• Retain spy function names and fix spy.named(name) (#1987)
• Document spying on accessors (#1976)

7.2.6 / 2019-03-01

• Upgrade @sinonjs/formatio
• Set fake.lastArg to last argument regardless of type

7.2.5 / 2019-02-27

• don't call extends.nonEnum in spy.resetHistory (#1984)

7.2.4 / 2019-02-18

• minor package updates
• Update eslint-plugin-mocha
• Fix high prio audit warnings
• Update nise to use @sinonjs/text-encoding
• Make all properties non-enumerable in spies, stubs, mocks and fakes
• docs(sandbox): add example for default sandbox

7.2.3 / 2019-01-19

• Update @sinonjs/nise
• Fix stubbing function objects (#1968)

7.2.2 / 2018-12-12

• Fix mock.withArgs using matchers (#1961)

7.2.1 / 2018-12-12

• #1957: check for truthiness before checking whether optional override is a stub
• Upgrade @sinonjs/samsam
• Upgrade @sinonjs/referee to v3

7.2.0 / 2018-12-10

• Upgrade to samsam 3 (#1955)
• Rename History.md to CHANGELOG.md

... (truncated)

Commits

• 33ca39b 7.2.7
• e8b997f Update CHANGELOG.md and AUTHORS for new release
• 7913865 Update @sinonjs/commons @sinonjs/formatio
• 19b3fc7 Retain spy function names and fix spy.named(name) (#1987)
• 3275d18 Document spying on accessors (#1976)
• 0468cd4 Update docs/changelog.md and set new release id in docs/_config.yml
• 7f2c8c2 Add release documentation for v7.2.6
• 36b99b3 7.2.6
• 1fc586e Update CHANGELOG.md and AUTHORS for new release
• c8758fd Upgrade @sinonjs/formatio
• Additional commits viewable in compare view

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[coveralls]

Coverage remained the same at 82.353% when pulling 5b8b46e on dependabot/npm_and_yarn/sinon-7.2.7 into e0c50a0 on master.

[dependabot-preview]

Superseded by #167.