pyproject: Make black optional so travis doesn't break on pypy

See also: psf/black#727
tony · Dec 26, 2019 · 565013a · 565013a
1 parent 6128706
commit 565013a
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/pyproject.toml b/pyproject.toml
@@ -45,7 +45,7 @@ intersphinx = ["tqdm"]
 [tool.poetry.dev-dependencies]
 flake8 = "^3.7.9"
 isort = "^4.3.21"
-black = "^19.10b0"
+black = {version = "^19.10b0", optional = true}
 sphinx = ">=2.0.0"
 alagitpull = "<1"
 sphinx_issues = "<2"