Compatibility with Composer 1 broken due to validate command

[jrfnl]

Description

Composer 1.x does not support the --no-check-version and will throw the below error causing the action to error out:

  [Symfony\Component\Console\Exception\RuntimeException]
  The "--no-check-version" option does not exist.

validate [--no-check-all] [--no-check-lock] [--no-check-publish] [-A|--with-dependencies] [--strict] [--] [<file>]

Steps to reproduce

1. Using Composer 1.x, try to run a composer install via the action and see it fail.
2. Run `composer validate --strict: it will indicate the composer.json is valid

Example code to reproduce the issue: jrfnl/composer-install-action-bug@98a82bd

Action run showing the bug: https://github.com/jrfnl/composer-install-action-bug/runs/4633075161?check_suite_focus=true

Expected behavior

That the dependencies would be installed without errors when using Composer 1.x.

Environment details

• version of this package: 2.0.2
• PHP version: not relevant
• OS: not relevant

[ramsey]

Fixed in #210