Bump github.com/urfave/cli/v2 from 2.4.0 to 2.20.3

[dependabot[bot]]

Bumps github.com/urfave/cli/v2 from 2.4.0 to 2.20.3.

Release notes

Sourced from github.com/urfave/cli/v2's releases.

v2.20.3

What's Changed

• Docs:(issue_1276) Make destination/value/default text clear by @​dearchap in urfave/cli#1539
• Fix:(issue_1263) FlagNames should return names set via env as well by @​dearchap in urfave/cli#1537
• Fix:(issue_1288). Add windows specific env format by @​dearchap in urfave/cli#1538

Full Changelog: https://github.com/urfave/cli/compare/v2.20.2...v2.20.3

v2.20.2

What's Changed

• Fix:(issue_1206) Default value shouldnt depend on env variable or val… by @​dearchap in urfave/cli#1528

Full Changelog: https://github.com/urfave/cli/compare/v2.20.1...v2.20.2

v2.20.1

What's Changed

• Docs: Fix docs from merged PR1498 by @​dearchap in urfave/cli#1532
• Cleanup: Fix app.go formatting by @​dearchap in urfave/cli#1533

Full Changelog: https://github.com/urfave/cli/compare/v2.20.0...v2.20.1

v2.20.0

What's Changed

• Cleanup redundant code in App/Command by @​dearchap in urfave/cli#1498

Full Changelog: https://github.com/urfave/cli/compare/v2.19.3...v2.20.0

v2.19.3

What's Changed

• Build and run urfave-cli-genflags via its Makefile by @​meatballhat in urfave/cli#1526

Full Changelog: https://github.com/urfave/cli/compare/v2.19.2...v2.19.3

v2.19.2

What's Changed

• fix: stop automatic sorting for --help by @​FGYFFFF in urfave/cli#1430

New Contributors

• @​FGYFFFF made their first contribution in urfave/cli#1430

Full Changelog: https://github.com/urfave/cli/compare/v2.19.1...v2.19.2

v2.19.1

What's Changed

• Fix:(issue_1500). Fix slice flag value duplication issue by @​dearchap in urfave/cli#1502

... (truncated)

Commits

• 8ea10b8 Merge pull request #1538 from dearchap/issue_1288
• d1ac284 Merge pull request #1537 from dearchap/issue_1263
• 96bff3c Remove flag_windows and use runtime
• 374bbfb Revert flag_test.go
• cf49ddb Merge pull request #1539 from urfave/issue_1276
• a5b62b8 Update docs/v2/examples/flags.md
• 8467e25 Docs:(issue_1276) Make destination/value/default text clear
• f460fd1 Run goimports
• da8868f Fix:(issue_1288). Add windows specific env format
• e302525 Fix:(issue_1263) FlagNames should return names set via env as well
• Additional commits viewable in compare view

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