chore(deps): update map2loop requirement in /requirements

Updates the requirements on [map2loop](https://github.com/Loop3D/map2loop) to permit the latest version.
- [Release notes](https://github.com/Loop3D/map2loop/releases)
- [Changelog](https://github.com/Loop3D/map2loop/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Loop3D/map2loop/commits)

---
updated-dependencies:
- dependency-name: map2loop
  dependency-version: 3.4.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements/testing.txt

@@ -9,5 +9,5 @@ geoh5py>=0.9 #saving models to hdf5
 dill>=0.4.1     #saving models to python
 shapely
 geopandas
-map2loop~=3.3.1
+map2loop~=3.4.0
 LoopDataConverter==0.3.0