[Security] Bump league/flysystem from 1.0.55 to 2.1.1

[dependabot-preview]

Bumps league/flysystem from 1.0.55 to 2.1.1.

Release notes

Sourced from league/flysystem's releases.

2.0.4

No release notes provided.

1.0.62

When resources are not actually file pointers, but fopen results from URL, the fstat call fails. This resulted in an error in PHP 7.4 because it's more strict about variable handling. This affected the Util::getStreamSize utility method.

Changelog

Sourced from league/flysystem's changelog.

Version 2.x Changelog

2.1.0 - 2021-05-25

Added

• [Core] the DirectoryAttributes now have an extraMetadata like files do.

Fixed

• [AwsS3V3] Allow the ACL config option to take precedence over the visibility key.

2.0.8 - 2021-05-15

Fixed

• [SFTP] Don't fail listing contents when a directory does not exist (#1301)

2.0.7 - 2021-05-13

Fixed

• [LocalFilesystem] convert windows style paths to unix style paths on listing

2.0.6 - 2021-05-13

Fixed

• [AsyncAwsS3] do not urlencode CopySource arguments (#1302)

2.0.5 - 2021-04-11

Fixed

• [AwsS3] ensure write errors are turned into exceptions.

2.0.4 - 2021-02-13

Fixed

• [InMemory] Corrected how the file size is determined.

2.0.3 - 2021-02-09

Fixed

• [AwsS3V3] Use the $config array during the copy operation.
• [Ftp] Close FTP connections when the object is destructed.
• [Core] Allow for an absolute root path of /.

... (truncated)

Commits

• a3c694d Reject funky whitspace paths.
• 27ba26d Allow longer retries for FTP failures.
• b95af22 Remove phpseclib v3 from subsplit in case we need to do a release.
• 86a74e8 Publish subsplit for phpseclib v3
• f75a41e Upgrade phpseclib with all deps
• 04777b7 Require as dev dep
• 34c8baf Run phpseclib3 group separately
• aae4007 Exclude group from test run
• f969ccf Exclude Phpseclib from SA
• ca1cf9d Skip tests when lib is not installed
• Additional commits viewable in compare view

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[dependabot-preview]

We've just been alerted that this update fixes a security vulnerability:

Sourced from The PHP Security Advisories Database.

TOCTOU Race Condition enabling remote code execution

Affected versions: ["<1.1.4", ">=2.0.0, <2.1.1"]

[dependabot-preview]

Superseded by #59.