Support dim expressions

[flying-sheep]

In in file tests/test_interface.py

hv-anndata/tests/test_interface.py

Lines 192 to 194 in 4e20bfe

	# TODO: https://github.com/holoviz-topics/hv-anndata/issues/109
	# 1. pytest.param(hv.dim(A.obs["type"]) == 0, {}, id="expression-eq"),
	# 2. pytest.param(hv.dim(A.obs["type"]).isin([0]), {}, id="expression-isin"),

seems to hang when I activate it …