Update pyproject.toml
I think this fits better
source:
@@ -14,7 +14,10 @@ jsonschema = "^3.2"
pandas = "^1.0.0"
duckdb = "^0.5.0"
sqlglot = "5.1.0"
-altair = "^4.1"
+altair = [
+ {version = "=4.1.0", python = "=3.6"},
+ {version = "^4.2.0", python = ">=3.7"}
+]
Jinja2 = "^3.0.3"
[tool.poetry.dev-dependencies]
