Because khalti_flutter >=2.2.0 depends on khalti ^1.1.0 which depends on package_info_plus ^3.0.2, khalti_flutter >=2.2.0 requires package_info_plus ^3.0.2.
So, because kilindar depends on both package_info_plus >=4.0.2 and khalti_flutter >=2.2.1, version solving failed.
Because khalti_flutter >=2.2.0 depends on khalti ^1.1.0 which depends on package_info_plus ^3.0.2, khalti_flutter >=2.2.0 requires package_info_plus ^3.0.2. So, because kilindar depends on both package_info_plus >=4.0.2 and khalti_flutter >=2.2.1, version solving failed.