Update lazysizes to version 1.4.0 🚀

[greenkeeperio-bot]

Hello :wave:

:rocket::rocket::rocket:

lazysizes just published its new version 1.4.0, 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 lazysizes – 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 34 commits .

• f6079c1 1.4.0
• 5ae9f13 fix width alias
• 1219553 documentation
• b8fdd29 compress & code style
• 79515fb Merge branch 'master' of https://github.com/aFarkas/lazysizes
• 615b121 document changes
• 5ad37c7 better handling of svg elements
• 65e2ac4 Merge pull request #213 from LRancez/feature/riasRatioHandling
• 937c3cb some code styling
• 1354a82 added ratio option and calculation. added compatibility for bgset plugin.
• dd44dc8 1.4.0-rc1
• e5de7f3 improves read-writes
• cd5652f improves optimumx
• 1efd790 improves documentation
• b8ee849 remove initial layout thrashing

There are 34 commits in total. See the full diff.

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