fix(deps): update dependency gemmi to >=0.7.3, <=0.7.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
gemmi	>=0.7.3, <=0.7.3 → >=0.7.3, <=0.7.4

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Release Notes

project-gemmi/gemmi (gemmi)

v0.7.4: 0.7.4

Compare Source

Library

• Add calculation of hydrogen bonds according to the venerable DSSP method
  (implementation of the whole DSSP method was considered, attempted and postponed)
• Add reading of MRC map in mode 12 (float16_t)
  (using the half library that's now bundled with gemmi)
• bundled third-party libs: updated fast_float
  and added https://sourceforge.net/projects/half
• Calculating anomalous maps (f") from a model
• gemmi <-> mmdb conversion: handle SEQRES
• to_mmcif: populate more items in _struct_ref_seq.
• to_pdb: to preserve original letter casing of modres.mod_id
• mmcif: read _em_3d_reconstruction.resolution into Structure::resolution
• Add a function populate_structure_from_block() (#​383)
• cif.hpp: keywords loop_, global_ and stop_ can be part of unquoted strings
  (stop_ is a keyword, but stop_it is not)
• Added Intensities::merged()
• Added add 6 PYR residues to the internal ResInfo table
• In add_hydrogens_without_positions(): tweaked how occupancies of neighbouring
  atoms are considered
• Tweaked determine_cutoff_radius() in dencalc.hpp

Programs

• blobs: can be called with a map instead of map coefficients
• h: add option --d-fract=FRACT (#​385) that adds atoms as H/D mix,
  with the given deuterium fraction.
• sf2map: add option --pow which outputs, for instance, a Pattterson map
• contact: add option --asus that list asymmetric units that are in contact with 1_555,
  not individual contacts.
• sfcalc: Add support for writing anomalous structure factors (FCanom and PHICanom columns)
  to MTZ files alongside regular structure factors.
• fix: gemmi convert --add-tls didn't work for mmCIF input

Python

• Added a small utility fetch.py to fetch files from the PDB:
  can be used as python -m gemmi.fetch 3abc
• Added read_structure_string()
• Added bindings to misc C++ functions
• Added FlatStructure that exposes coordinate data in a single table

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