Update should to version 8.1.0 🚀

[greenkeeperio-bot]

Hello :wave:

:rocket::rocket::rocket:

should just published its new version 8.1.0, which is not covered by your current version range.

If this pull request passes your tests you can publish your software with the latest version of should – otherwise use this branch to work on adaptions and fixes.

Happy fixing and merging :palm_tree:

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The new version differs by 60 commits .

• 57a2013 Release 8.1.0
• 4ad9880 Merge pull request #95 from seegno-forks/enhancement/add-date-type-assertion
• c37ecf9 Add Date type assertion
• 24bcb15 Release 8.0.2
• 4a0dd35 Update modules
• 73118ae Update docs for assert.deepEqual
• 49c4b55 Release 8.0.1
• a4b72a6 Do not throw TypeError when matching against null and undefined
• 3adfd76 Update assertion.js
• e1ddec2 Update promise.js
• 871fd61 Release 8.0.0
• a364a0c Move should-promised to main repo
• 08f22a3 Update headers
• 23e9971 Add new entry file. Now we expose window.should as should global function
• aacf9fc Update eslint config

There are 60 commits in total. See the full diff.

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