Update phpspec/phpspec requirement from ^4.0 to ^6.2

[dependabot-preview[bot]]

Updates the requirements on phpspec/phpspec to permit the latest version.

Release notes

Sourced from phpspec/phpspec's releases.

6.2.0

Fixed

• Detect correct version of symfony event dispatcher @akuzia

Added

• Allow sebastian/exporter 4.0 and therefore phpunit 9 @gnugat

Changelog

Sourced from phpspec/phpspec's changelog.

6.2.0

Fixed

• Detect correct version of symfony event dispatcher @akuzia

Added

• Allow sebastian/exporter 4.0 and therefore phpunit 9 @gnugat

6.1.1

Fixed

• Fixed regression that caused classes to be instantiated in cases where they previously were not @ciaranmcnulty

6.1.0

Added

• JSON formatter @chris-kruining
• Add file and line number to parse error output @gquemener
• Symfony 5 compatibility @alexander-schranz
• PHP 7.4 compatibility @ddziaduch, @ciaranmcnulty

6.0.0

Changed

• Bumped minimum PHP and Symfony dependences @ciaranmcnulty
• AfterSpecification event now always fires in case of failure @chris-kruining
• Removed Prophecy\Argument use statement from templates @DonCallisto

Commits

• 763c4e3 Update getting started docs
• 653d5f7 Update changelog and prep for 6.2.0
• 33b28e0 Merge pull request #1307 from ciaranmcnulty/akuzia-legacy-ed-#1294
• e7cc7c0 Refactor contract analysis for clarity
• f0523f0 Unwrap collaborators if dispatching to them
• 9a73dc1 Remove unused
• 0758c6e Reword comment
• 73443e7 reverse contract check
• b465b1d check for event dispatcher contract Closes #1294
• 6b4ec5c Merge pull request #1297 from gnugat/patch-1
• Additional commits viewable in compare view

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[dependabot-preview[bot]]

Superseded by #106.