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Silence deprecation messages #70 thanks to @tm1000

Add progress bar #66 thanks to @tm1000

• Add return code to execute command, should fix #64
• Fix testing with old versions of Symfony and code styling tool

• Due to the backward compatibility issues with Composer 2.3, specify in composer.json that it's not yet supported. See https://blog.packagist.com/composer-2-3/ for more details.

• Drop support of Symfony 3 #63 thanks to @tm1000
• Add support for Symfony 6 #63 thanks to @tm1000

• Throw error when the version is not specified #57 thanks to @LeJeanbono
• Display the correct repository type instead of always Nexus #58 - Thanks to @hexa2k9 and @LeJeanbono

• Add support for access tokens #51 #55 - Thanks to @LeJeanbono
• Use version from composer.json if none is specified in the CLI #10 #56 - Thanks to @LeJeanbono

• Rename from elendev/nexus-composer-push to elendev/composer-push. #50
• Add Apache-2.0 to composer.json. #50

• Add artifactory support by using "type": "artyfactory" in configuration. #49
• Last version of elendev/nexus-composer-push, use elendev/composer-push instead.
• Change namespace from Elendev\NexusComposerPush to Elendev\ComposerPush. #49

• nexus-push command is now deprecated, use push instead. #46
• nexus-push configuration in the composer.json file is deprecated, use push instead #46
• Support of composer <1.10 dropped, composer versions supported: ^1.10|^2.0 #45
• Add options to support multiple repository types. Currently only nexus is supported. #46
• Add ssl-verify parameter in configuration #47