Update league/flysystem from 1.0.44 to 1.0.45

[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:

• a99f94e Update tests for the fix
• 9d482a3 Fixes #908, always set pathinfo dirname.
• 464c6de renamed variable
• e794a9c Fixed #923: corrected variable name
• ee29264 Merge pull request #922 from holtkamp/patch-1
• cf77e78 int|false as return type in PHPDoc for getTimestamp()
• ba98ebe Show textual version on mobile for now
• 1848a62 Minimizing css put back
• 224add7 Use csso the other plugin re-ordered css which broke the design.
• e1b5e34 Remove merge conflict indicator
• f61ec6c Added google analytics ID
• 670430b Merge branch 'master' of github.com:thephpleague/flysystem
• 7fe2668 The new website!
• 868cbf7 Merge pull request #917 from thominj/feature/add-mimetypes
• 99a8d7b Added some mimetypes to list
• d452081 Merge pull request #916 from holtkamp/patch-2
• db2397f Properly import PHPCR\SimpleCredentials
• 5d74013 Merge pull request #915 from holtkamp/patch-1
• 70ecd05 Add missing space
• 299fce9 Added missing @throws docs
• 16f22cb Merge pull request #911 from kubk/patch-1
• d27dbe4 Add missed tags for digitalocean-spaces.md
• 681f910 Merge pull request #910 from kubk/patch-1
• 52f2ebb Add example for Digital Ocean Spaces

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