Update sinon requirement from 2.0.0-pre.2 to 7.2.4

[dependabot-preview]

Updates the requirements on sinon to permit the latest version.

Changelog

Sourced from sinon's changelog.

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
• Update docs/changelog.md and set new release id in docs/_config.yml
• Add release documentation for v7.2.3

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

7.1.1 / 2018-10-31

• Make the spy functions non enumerable so that printing it is more concise (#1936)

7.1.0 / 2018-10-25

• Issue #1852: Add a way to pass a global context to lolex when calling useFakeTimers
• Get latest 'nise' patch

7.0.0 / 2018-10-14

... (truncated)

Commits

• e5de1fe 7.2.4
• d158672 Update CHANGELOG.md and AUTHORS for new release
• 1431c78 minor package updates
• 37c955d Merge pull request #1979 from fatso83/update-npm-deps
• fc2a32a Merge pull request #1975 from ehmicky/master
• 85f2fcd Update eslint-plugin-mocha
• 707e068 Fix high prio audit warnings
• 8282bc0 Update nise to use @sinonjs/text-encoding
• c1d9625 Make all properties non-enumerable in spies, stubs, mocks and fakes
• 894951c Merge pull request #1973 from mgred/default-sandbox-example
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #160.