Revert "[Scoper] Skip Prefix\Composer\ usage"

[samsonasik]

Reverts #6293 change all $prefix\Composer\ to Composer cause error on php 7.1 scoped. Reverting it.

[TomasVotruba]

Please use separated scoper.php file for PHP 7.0, so it won't break the build PHP 7.1 like last week

[TomasVotruba]

See https://github.com/rectorphp/rector-prefixed, now if fails :(

[samsonasik]

yes, it is strange:

  git add --all
  git commit -m "Updated Rector to commit 10705059a3a0e6b791d175daba90d37cd365ab0e" -m "https://github.com/rectorphp/rector/commit/10705059a3a0e6b791d175daba90d37cd365ab0e Revert "[Scoper] Skip Prefix\Composer\ usage (#6293)" (#6294)"
  git push --quiet origin main
  shell: /usr/bin/bash -e {0}
  env:
    COMPOSER_ROOT_VERSION: dev-main

/home/runner/work/_temp/04d218f8-1262-472a-9f8c-7399302355c7.sh: line 2: syntax error near unexpected token `('
Error: Process completed with exit code 2.

which work on previous commit that is reverted deprecated-packages/rector-prefixed@e144121