Binary lens with extranl mass sheet added by alpv95: - BinaryLensWithShear - CausticsWithShear - tests for the two above - `convergence_K`, `shear_G`, and `is_external_mass_sheet` in ModelParameters - binarylensimports.py as a new file - VBBL - license, `BinaryMag0_shear()`, `NewImages_shear()`, and `VBBL_SG12_9_wrapper`
2.7.2
Test of recent changes in .github/workflows/publish.yml