Fix minimal aiida-core version to 1.3.0

Minimal aiida-core version has to be fixed due to the recently
introduced change in the aiida-core package moving the resources
validation to the scheduler plugin.

see aiidateam/aiida-core#4192

aiida_cusp/calculators/calculation_base.py

@@ -171,8 +171,6 @@ def vasp_calc_mpi_args(self):
         scheduler = computer.get_scheduler()
         resources = self.inputs.metadata.options.resources
         default_cpus_machine = computer.get_default_mpiprocs_per_machine()
-        if default_cpus_machine is not None:
-            resources['default_mpiprocs_per_machine'] = default_cpus_machine
         job_resource = scheduler.create_job_resource(**resources)
         tot_num_mpiprocs = job_resource.get_tot_num_mpiprocs()
         mpi_arg_dict = {'tot_num_mpiprocs': tot_num_mpiprocs}

setup.json

@@ -36,7 +36,7 @@
 			]
     },
     "install_requires": [
-      "aiida-core>=1.2.1,<2.0.0",
+      "aiida-core>=1.3.0,<2.0.0",
       "custodian",
       "pymatgen",
 			"ase"