Allow CI to install older PHPUnit for legacy PHP

[macbre]

https://phpunit.de/supported-versions.html

[macbre]

PHP 5.3

PHP Parse error:  syntax error, unexpected '.', expecting '&' or T_VARIABLE in /home/runner/work/amazon-s3-php-class/amazon-s3-php-class/vendor/symfony/deprecation-contracts/function.php on line 23

$ composer why symfony/deprecation-contracts
guzzlehttp/guzzle 7.5.0 requires symfony/deprecation-contracts (^2.2 || ^3.0) 

PHP 7.0

PHP Parse error:  syntax error, unexpected '?', expecting variable (T_VARIABLE) in /home/runner/work/amazon-s3-php-class/amazon-s3-php-class/tests/S3Test.php on line 31

[coveralls]

Pull Request Test Coverage Report for Build 4243895887

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 23.415%

---

Totals
Change from base Build 4165652942:	0.0%
Covered Lines:	229
Relevant Lines:	978

---

💛 - Coveralls

[macbre]

composer update --lock

[coveralls]

Pull Request Test Coverage Report for Build 4243787010

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 23.415%

---

Totals
Change from base Build 4165652942:	0.0%
Covered Lines:	229
Relevant Lines:	978

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 4243732507

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 23.415%

---

Totals
Change from base Build 4165652942:	0.0%
Covered Lines:	229
Relevant Lines:	978

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 4243787010

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 23.415%

---

Totals
Change from base Build 4165652942:	0.0%
Covered Lines:	229
Relevant Lines:	978

---

💛 - Coveralls