Init Yarn with a package.json before installing

Necessary to make django-yarnpkg it compatible with Yarn 4.x

CHANGELOG.rst

+Version 6.1.1 (2024-02-09)
+=====================================================
+
+* Fix compatibility with Yarn 4.x
+
 Version 6.1.0 (2023-02-19)
 =====================================================
 

django_yarnpkg/yarn.py

@@ -35,6 +35,7 @@ class YarnAdapter(object):
 
     def install(self, packages, *options):
         """Install packages from yarn"""
+        self.call_yarn(["init", "--yes"])
         return self.call_yarn(['add'] + list(options) + list(packages))
 
     def _accumulate_dependencies(self, data):