Update league/flysystem from 1.0.45 to 1.0.46

[violinist-bot]

If you have a decent test suite, and your tests pass, it should be both safe and smart to merge this update.

Here is a list of changes between the version you use, and the version this pull request updates to:

• f3e0d92 Pre-release changelog
• 6c67024 Fixed #958: Account for stream copy failures
• 40666db Merge pull request #956 from wouldntsavezion/patch-1
• cd6336a Very minor typo but I saw it.
• 2dead75 Merge pull request #954 from thephpleague/appveyor
• 9c79514 Run phpspec.
• 9395355 Enable mbstring.
• e054384 Set minimum PHPUnit version.
• 558ea6e Idealized appveyor config that only took all day.
• b114a30 Merge pull request #953 from chadburrus/patch-2
• 51f06d8 fix formatting
• 5f932a7 Added 2 new bronze sponsors
• ef12ee0 Merge pull request #951 from absolux/patch-1
• cd41056 Updated azure logos
• ec7d670 Restore old state of dist/style.css
• 45329a3 recommendation applied
• 2da2905 More docs work
• 238cdb8 Show gold sponsor Azure
• 3ac49b2 Show Azure sponsorship
• a4d01fd [CSS] Fix the overflow of code snippets
• 611658d Put azure on common adapter list
• 5c044e0 Updated azure blob storage link
• df46f83 Merge branch 'master' of github.com:thephpleague/flysystem
• f29cef5 Updated azure blob storage adapter docs
• a3c156f Merge pull request #945 from zaak/master
• 03e08eb Added PDO database adapter to Community Supported adapter list
• b74cabb Merge pull request #941 from guillaumesmo/guillaumesmo-patch-1
• feb5fba Updated copy throws
• 454d653 Merge pull request #938 from vitorbari/utf8-mode-tests
• 6a73c69 Merge pull request #937 from holtkamp/patch-1
• 365a3f6 usefull => useful
• b265748 "current" timestamp => the current system time
• be215ca Add section how to indicate specific modification timestamp
• bc9e9c1 Upgrade script for carbon
• 137ad80 Merge pull request #935 from holtkamp/patch-1
• 57ac3ae Indicate that Credentials are optional during login
• e6ae317 Suppressed Warnings on unlink and added tests to support change.
• cd78a1d Merge pull request #927 from TomK32/patch-1
• 23a37a5 Fix strftime in api doc
• 2e9a587 Merge pull request #912 from judgej/patch-3
• c6560c7 Remove .github dir from the artifacts
• 1c996c3 Added issue templates
• b517b03 Fixed mobile searchbar styles
• bbfb504 Enabled algolia search and corrected ul styling
• 2834014 Merge pull request #925 from beryllium/patch-1
• 9c011c2 Adding some "Getting Started" links
• 4f73684 Added deprecations.md
• 213e422 Update changelog and docs version
• 771bf12 Add tests for ftp utf8 mode
• 19237d3 Added community supported Azure File Storage driver

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