GraphQL: Update Python dependencies

[amotl]

Any ideas how to verify updates to those?

• Update graphene requirement from <3 to <4 #573
• Update graphql-server-core requirement from <2,>=1.2 to >=1.2,<3 #574

It will probably be a manual procedure until there are software tests covering some of the details? Those won't be enough, will they?

responder/tests/test_graphql.py

Lines 6 to 38 in a698eaa

	from responder.ext.graphql import GraphQLView
	@pytest.fixture
	def schema():
	class Query(graphene.ObjectType):
	hello = graphene.String(name=graphene.String(default_value="stranger"))
	def resolve_hello(self, info, name):
	return f"Hello {name}"
	return graphene.Schema(query=Query)
	def test_graphql_schema_query_querying(api, schema):
	api.add_route("/", GraphQLView(schema=schema, api=api))
	r = api.requests.get("http://;/?q={ hello }", headers={"Accept": "json"})
	assert r.status_code == 200
	assert r.json() == {"data": {"hello": "Hello stranger"}}
	def test_graphql_schema_json_query(api, schema):
	api.add_route("/", GraphQLView(schema=schema, api=api))
	r = api.requests.post("http://;/", json={"query": "{ hello }"})
	assert r.status_code < 300
	assert r.json() == {"data": {"hello": "Hello stranger"}}
	def test_graphiql(api, schema):
	api.add_route("/", GraphQLView(schema=schema, api=api))
	r = api.requests.get("http://;/", headers={"Accept": "text/html"})
	assert r.status_code < 300
	assert "GraphiQL" in r.text