remove warnings

[dcherian]

=============================== warnings summary ===============================
../../../../../usr/share/miniconda/envs/pop-tools-dev/lib/python3.7/site-packages/_pytest/config/__init__.py:1233
  /usr/share/miniconda/envs/pop-tools-dev/lib/python3.7/site-packages/_pytest/config/__init__.py:1233: PytestConfigWarning: Unknown config option: collect_ignore
  
    self._warn_or_fail_if_strict(f"Unknown config option: {key}\n")

tests/test_fill.py::test_lateral_fill_np_array
tests/test_fill.py::test_lateral_fill_np_array_ltripole
tests/test_fill.py::test_lateral_fill_np_array_SOR
tests/test_fill.py::test_lateral_fill_np_array_ltripole_SOR
  /home/runner/work/pop-tools/pop-tools/tests/test_fill.py:186: DeprecationWarning: `np.bool` is a deprecated alias for the builtin `bool`. To silence this warning, use `bool` by itself. Doing this will not modify any behavior and is safe. If you specifically wanted the numpy scalar type, use `np.bool_` here.
  Deprecated in NumPy 1.20; for more details and guidance: numpy.org/devdocs/release/1.20.0-notes.html#deprecations
    valid_points = np.ones(z_orig.shape, dtype=np.bool)

tests/test_fill.py::test_lateral_fill_2D
tests/test_fill.py::test_lateral_fill_2D
tests/test_grid.py::test_get_grid[POP_gx1v7]
tests/test_grid.py::test_get_grid[POP_gx1v6]
tests/test_grid.py::test_get_grid[POP_tx0.1v3]
tests/test_grid.py::test_get_grid[POP_tx0.1v2]
  /usr/share/miniconda/envs/pop-tools-dev/lib/python3.7/site-packages/urllib3/connectionpool.py:1020: InsecureRequestWarning: Unverified HTTPS request is being made to host 'svn-ccsm-inputdata.cgd.ucar.edu'. Adding certificate verification is strongly advised. See: urllib3.readthedocs.io/en/latest/advanced-usage.html#ssl-warnings
    InsecureRequestWarning,

tests/test_fill.py: 4 warnings
tests/test_grid.py: 13 warnings
tests/test_region_masks.py: 11 warnings
  /home/runner/work/pop-tools/pop-tools/pop_tools/grid.py:142: DeprecationWarning: `np.float` is a deprecated alias for the builtin `float`. To silence this warning, use `float` by itself. Doing this will not modify any behavior and is safe. If you specifically wanted the numpy scalar type, use `np.float64` here.
  Deprecated in NumPy 1.20; for more details and guidance: numpy.org/devdocs/release/1.20.0-notes.html#deprecations
    ULAT = grid_file_data[0, :, :].astype(np.float)

tests/test_fill.py: 4 warnings
tests/test_grid.py: 13 warnings
tests/test_region_masks.py: 11 warnings
  /home/runner/work/pop-tools/pop-tools/pop_tools/grid.py:143: DeprecationWarning: `np.float` is a deprecated alias for the builtin `float`. To silence this warning, use `float` by itself. Doing this will not modify any behavior and is safe. If you specifically wanted the numpy scalar type, use `np.float64` here.
  Deprecated in NumPy 1.20; for more details and guidance: numpy.org/devdocs/release/1.20.0-notes.html#deprecations
    ULONG = grid_file_data[1, :, :].astype(np.float)

tests/test_fill.py: 4 warnings
tests/test_grid.py: 13 warnings
tests/test_region_masks.py: 11 warnings
  /home/runner/work/pop-tools/pop-tools/pop_tools/grid.py:144: DeprecationWarning: `np.float` is a deprecated alias for the builtin `float`. To silence this warning, use `float` by itself. Doing this will not modify any behavior and is safe. If you specifically wanted the numpy scalar type, use `np.float64` here.
  Deprecated in NumPy 1.20; for more details and guidance: numpy.org/devdocs/release/1.20.0-notes.html#deprecations
    HTN = grid_file_data[2, :, :].astype(np.float)

tests/test_fill.py: 4 warnings
tests/test_grid.py: 13 warnings
tests/test_region_masks.py: 11 warnings
  /home/runner/work/pop-tools/pop-tools/pop_tools/grid.py:145: DeprecationWarning: `np.float` is a deprecated alias for the builtin `float`. To silence this warning, use `float` by itself. Doing this will not modify any behavior and is safe. If you specifically wanted the numpy scalar type, use `np.float64` here.
  Deprecated in NumPy 1.20; for more details and guidance: numpy.org/devdocs/release/1.20.0-notes.html#deprecations
    HTE = grid_file_data[3, :, :].astype(np.float)

tests/test_fill.py: 4 warnings
tests/test_grid.py: 13 warnings
tests/test_region_masks.py: 11 warnings
  /home/runner/work/pop-tools/pop-tools/pop_tools/grid.py:148: DeprecationWarning: `np.float` is a deprecated alias for the builtin `float`. To silence this warning, use `float` by itself. Doing this will not modify any behavior and is safe. If you specifically wanted the numpy scalar type, use `np.float64` here.
  Deprecated in NumPy 1.20; for more details and guidance: numpy.org/devdocs/release/1.20.0-notes.html#deprecations
    TLAT = np.empty((nlat, nlon), dtype=np.float)

tests/test_fill.py: 4 warnings
tests/test_grid.py: 13 warnings
tests/test_region_masks.py: 11 warnings
  /home/runner/work/pop-tools/pop-tools/pop_tools/grid.py:149: DeprecationWarning: `np.float` is a deprecated alias for the builtin `float`. To silence this warning, use `float` by itself. Doing this will not modify any behavior and is safe. If you specifically wanted the numpy scalar type, use `np.float64` here.
  Deprecated in NumPy 1.20; for more details and guidance: numpy.org/devdocs/release/1.20.0-notes.html#deprecations
    TLONG = np.empty((nlat, nlon), dtype=np.float)

tests/test_grid.py::test_get_grid_scrip
  /home/runner/work/pop-tools/pop-tools/pop_tools/grid.py:442: DeprecationWarning: `np.float` is a deprecated alias for the builtin `float`. To silence this warning, use `float` by itself. Doing this will not modify any behavior and is safe. If you specifically wanted the numpy scalar type, use `np.float64` here.
  Deprecated in NumPy 1.20; for more details and guidance: numpy.org/devdocs/release/1.20.0-notes.html#deprecations
    corner_lat = np.empty((nlat, nlon, 4), dtype=np.float)

tests/test_grid.py::test_get_grid_scrip
  /home/runner/work/pop-tools/pop-tools/pop_tools/grid.py:443: DeprecationWarning: `np.float` is a deprecated alias for the builtin `float`. To silence this warning, use `float` by itself. Doing this will not modify any behavior and is safe. If you specifically wanted the numpy scalar type, use `np.float64` here.
  Deprecated in NumPy 1.20; for more details and guidance: numpy.org/devdocs/release/1.20.0-notes.html#deprecations
    corner_lon = np.empty((nlat, nlon, 4), dtype=np.float)

tests/test_xgcm_util.py::test_to_xgcm_grid_dataset[tend_zint_100m_Fe.nc]
tests/test_xgcm_util.py::test_to_xgcm_grid_dataset[g.e20.G.TL319_t13.control.001_hfreq-coarsen.nc]
  /home/runner/work/pop-tools/pop-tools/pop_tools/xgcm_util.py:107: PendingDeprecationWarning: dropping variables using `drop` will be deprecated; using drop_vars is encouraged.
    ds_new = ds_new.drop('z_w_top').rename({'z_w': 'z_w_top'})