Update this extension for new version of Yii framework(2.0.14)

[avs123a]

C:\xampp\htdocs\sites\yii2-shop>composer require --prefer-dist pendalf89/yii2-fi
lemanager "*"
./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
- Installation request for sebastian/resource-operations (locked at 2.0.x-de
v) -> satisfiable by sebastian/resource-operations[2.0.x-dev].
- phpunit/phpunit 6.5.x-dev requires sebastian/resource-operations ^1.0 -> s
atisfiable by sebastian/resource-operations[1.0.0].
- phpunit/phpunit 6.5.x-dev requires sebastian/resource-operations ^1.0 -> s
atisfiable by sebastian/resource-operations[1.0.0].
- phpunit/phpunit 6.5.x-dev requires sebastian/resource-operations ^1.0 -> s
atisfiable by sebastian/resource-operations[1.0.0].
- Conclusion: don't install sebastian/resource-operations 1.0.0
- Installation request for phpunit/phpunit (locked at 6.5.x-dev, required as
~6.5.5) -> satisfiable by phpunit/phpunit[6.5.x-dev].

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

Update your module, please