Relax character restriction

Author: dcherian

tests/test_properties.py

@@ -16,12 +16,9 @@
 
 #### TODO: Provide this in zarr.strategies
 # Copied from Xarray
-# only use characters within the "Latin Extended-A" subset of unicode
-_readable_characters = st.characters(categories=["L", "N"], max_codepoint=0x017F)
-_readable_strings = st.text(_readable_characters, max_size=5)
-_attr_keys = st.text(_readable_characters, min_size=1)
+_attr_keys = st.text(st.characters(), min_size=1)
 _attr_values = st.recursive(
-    st.none() | st.booleans() | _readable_strings,
+    st.none() | st.booleans() | st.text(st.characters(), max_size=5),
     lambda children: st.lists(children) | st.dictionaries(_attr_keys, children),
     max_leaves=3,
 )