Tests

adding HGM to tests matrix #132

Job	Run time
Initial setup	6s
devmirror lint	2m 58s
devmirror abvar/fq bianchi_modular_forms number_fields	2m 50s
devmirror galois_groups siegel_modular_forms	2m 47s
devmirror elliptic_curves hecke_algebras tests	2m 51s
devmirror hilbert_modular_forms sato_tate_groups tests	2m 55s
devmirror api characters cluster_pictures ecnf local_fields	2m 58s
devmirror belyi higher_genus_w_automorphisms lattice maass_forms tests users	2m 49s
devmirror artin_representations genus2_curves	3m 0s
devmirror classical_modular_forms	3m 12s
devmirror lfunctions	2m 59s
devmirror groups/abstract	2m 58s
devmirror modular_curves	2m 47s
	35m 10s

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