Update dependency sw-precache-webpack-plugin to v0.11.5

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
sw-precache-webpack-plugin	0.9.2 -> 0.11.5

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Release Notes

goldhand/sw-precache-webpack-plugin

v0.11.5

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• Update circleci to node v6.11.5
• Add explicit MIT license
• Update package locks
• add support for webpack 4 (#​138)
• Replacing prepublish script with prepare. (#​112)
• Fixed service worker file name (#​111)
• use uglify-es,
• Don't lose implicit instance of outputFileSystem; Don't swallow fs (#​110)
• modify "importSripts" to "importScripts" (#​98)

v0.11.4

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• Update to webpack 3

v0.11.3

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• avoid promisifying fs ops (fixes #​81) (#​82)

v0.11.2

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• Update uglify-js usage to v3 api

v0.11.1

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• ⬆️ Update dependencies
• Update example in readme
• Remove unused Template var from tests
• Fix errors for MultiCompilers build (#​78)
• Add strip prefix multi windows support (#​76)

v0.11.0

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• Added [chunkhash]/[hash]/[id]/[name] support for importScripts (#​70)

v0.10.1

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• Update npmignore files

v0.10.0

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• Update unit tests
• Modularize and refactor
• Remove forceDelete
• Add debug option
• Add final webpack-dev-server notes to readme
• Remove unaffected sw-precache options from readme

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