Update CHANGELOG.md

MKodde · MKodde · commit 2924e2973466 · 2021-09-23T13:20:24.000+02:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
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+# 4.3.0
+**New feature**
+* Further support Symfony 4 by adhering to the Twig environment in favor of
+  the old 'Environment' solution
+
 # 4.2.0
 **New feature**
 * Support for SAML extensions on Authn SAML requests
