Require ext-zip for development

[jjok]

Description

ext-zip seems to be required for development, but isn't specified in composer.json.

There were 2 failures:

1) PhpOffice\PhpWord\TemplateProcessorTest::testXslStyleSheetCanNotBeAppliedOnFailureOfSettingParameterValue
Failed asserting that exception of type "Error" matches expected exception "\PhpOffice\PhpWord\Exception\Exception". Message was: "Class 'ZipArchive' not found" at
/home/jonathan/Workspace/PHPWord/src/PhpWord/Shared/ZipArchive.php:134
/home/jonathan/Workspace/PHPWord/src/PhpWord/TemplateProcessor.php:88
/home/jonathan/Workspace/PHPWord/tests/PhpWord/TemplateProcessorTest.php:122
.

2) PhpOffice\PhpWord\TemplateProcessorTest::testXslStyleSheetCanNotBeAppliedOnFailureOfLoadingXmlFromTemplate
Failed asserting that exception of type "Error" matches expected exception "\PhpOffice\PhpWord\Exception\Exception". Message was: "Class 'ZipArchive' not found" at
/home/jonathan/Workspace/PHPWord/src/PhpWord/Shared/ZipArchive.php:134
/home/jonathan/Workspace/PHPWord/src/PhpWord/TemplateProcessor.php:88
/home/jonathan/Workspace/PHPWord/tests/PhpWord/TemplateProcessorTest.php:144
.

ERRORS!
Tests: 574, Assertions: 1413, Errors: 133, Failures: 2, Skipped: 1.

[coveralls]

Coverage remained the same at 94.908% when pulling d476f7a on jjok:require-zip-for-dev into 4fa9455 on PHPOffice:develop.

[troosan]

I guess that true for all dependencies defined in the "suggest" section.

[jjok]

Ah, yeah, probably. I'll have a look.

[jjok]

What's the deal with "ext-gd2"? Is that a requirement? "mpdf/mpdf" seems to require "ext-gd".

I think I'll put that in the dev requirements, rather than 2.

[Rar9]

I got

php -i | grep "GD library Version"
GD library Version => 2.2.5

and also the Complained for ext-gd2 . What to fix to get ride of this notice.