Dependency error with nikic/php-parser

[fahadbillah]

For some other packages composer installed nikic/php-parser v1.4.1
Now kenjis/ci-phpunit-test's composer want to remove it (v2.1.0)
But it creates error
Please help me out solving this issue

composer require kenjis/ci-phpunit-test --dev

Using version ^0.12.2 for kenjis/ci-phpunit-test
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

Problem 1
- don't install kenjis/ci-phpunit-test v0.12.2|remove nikic/php-parser v1.4.1
- don't install nikic/php-parser v1.4.1|don't install kenjis/ci-phpunit-test v0.12.2
- don't install kenjis/ci-phpunit-test v0.12.2|don't install nikic/php-parser v1.4.1
- Installation request for kenjis/ci-phpunit-test ^0.12.2 -> satisfiable by kenjis/ci-phpunit-test[v0.12.2].
- Installation request for nikic/php-parser == 1.4.1.0 -> satisfiable by nikic/php-parser[v1.4.1].

Installation failed, reverting ./composer.json to its original content.

[kenjis]

Sorry, but it is typical conflict. ci-phpunit-test needs v2.1.0 (in some reasons, it is included in ci-phpunit-test), but your other package needs v1.4.1.

But if you don't use Monkey Patching in ci-phpunit-test, php-parser v2.1.0 is not needed.
You have two choices:

1. install ci-phpunit-test via the Zip file.
2. fork ci-phpunit-test and create your custom package, and just remove the line for php-parser in composer.json. https://github.com/kenjis/ci-phpunit-test/blob/master/composer.json#L25-L27