Make things work with older numpy

.gitignore

@@ -85,3 +85,4 @@ _version.py
 .env
 ows_refactored/
 local_cfg/
+.mypy_cache/

datacube_ows/styles/ramp.py

@@ -16,13 +16,17 @@
 from colour import Color
 from matplotlib import pyplot as plt
 from matplotlib.colors import LinearSegmentedColormap, to_hex
-from numpy.typing import NDArray
-from xarray import Dataset
+
+try:
+    from numpy.typing import NDArray
+except ImportError:
+    NDArray = numpy.ndarray
 
 from datacube_ows.config_utils import CFG_DICT
 from datacube_ows.ogc_utils import ConfigException, FunctionWrapper
 from datacube_ows.styles.base import StyleDefBase
 from datacube_ows.styles.expression import Expression
+from xarray import Dataset
 
 _LOG = logging.getLogger(__name__)
 matplotlib.use('Agg')

setup.py

@@ -21,7 +21,7 @@
     'deepdiff',
     'matplotlib',
     'pyparsing>=2.2.1,<3',  # resolving dependency conflict between matplotlib and packaging
-    'numpy>=1.21.1',
+    'numpy',
     'scipy',
     'Pillow',
     'Babel',