chore(deps-dev): update boundwize/structarmed requirement from 0.15.3 to 0.15.6 in the composer-dependencies group

[dependabot]

Updates the requirements on boundwize/structarmed to permit the latest version.
Updates boundwize/structarmed to 0.15.6

Release notes

Sourced from boundwize/structarmed's releases.

Released: StructArmed 0.15.6

What's Changed

• perf: Avoid repeated is_dir() on temporaryFile() method on ParallelClassNodeExtractor by @​samsonasik in boundwize/structarmed#237
• fix: Count each match arm as a decision point in cyclomatic complexity by @​samsonasik in boundwize/structarmed#240

Full Changelog: boundwize/structarmed@0.15.5...0.15.6

Commits

• 2ba72a1 update version screenshot
• 41e2244 Merge pull request #240 from boundwize/complex-arm
• e5decaf fix: Count each match arm as a decision point in cyclomatic complexity
• a94bc53 Merge pull request #237 from boundwize/perf-is-dir
• be373ef perf: Avoid repeated is_dir() on temporaryFile() method on ParallelClassNodeE...
• 3a35aea update version screeenshot
• 29aabfa Merge pull request #236 from boundwize/perf-composer-path
• fc77981 add more tests
• ab52ad6 perf: Cache Composer base-path lookups in Psr4NamespaceRule
• d16658f Merge pull request #235 from boundwize/fnmatch
• Additional commits viewable in compare view

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[paulbalandan]

@samsonasik can you use caret here so that dependabot will only prompt for minor bumps while structarmed is still pre-v1?

[samsonasik]

@paulbalandan sure, structarmed is pretty stable now. I will create separate PR.

[dependabot]

Looks like boundwize/structarmed is no longer updatable, so this is no longer needed.