Merge pull request #773 from pypa/flit-init-lt5

Allow flit_core 4.x in projects newly set up with 'flit init'

Author: takluyver

flit/init.py

@@ -236,7 +236,7 @@ def initialise(self):
 
 TEMPLATE = """\
 [build-system]
-requires = ["flit_core >=3.11,<4"]
+requires = ["flit_core >=3.11,<5"]
 build-backend = "flit_core.buildapi"
 
 [project]