Update sharp to version 0.13.1 🚀

[greenkeeperio-bot]

Hello :wave:

:rocket::rocket::rocket:

sharp just published its new version 0.13.1, 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 sharp – 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 132 commits .

• c210ac7 Release v0.13.1
• 962c91d OpenSUSE package name for npm has changed
• df33c30 Fix embedding onto transparent backgrounds #366
• 62e04f7 Merge pull request #361 from jardakotesovec/clone-clean-up
• 32fcb77 clone clean up
• a21760b Release v0.13.0
• cd05c78 Merge pull request #359 from wjordan/alpine-packaging-test
• 7b12f09 use alpine:edge image for packaging test
• e149e60 Use libvips-dev apk for alpine-linux packaging test
• bdac840 Update perf results for forthcoming v0.13.0
• 2d05804 Add cache recommendations for use with Alpine/musl #354
• 2a56de6 Add Alpine Linux packaging test #354
• 6ca2a4a Ensure sharp.format lists support for raw input #220
• a9eb65c Most Linux systems no longer require the preinstall script
• afb30b3 Ensure VipsArea is unreferenced after Buffer-based output

There are 132 commits in total. See the full diff.

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