Adding provide psr/simple-cache-implementation

composer.json

@@ -67,6 +67,9 @@
         "lib-ICU": "The intl PHP library, to use Text::transliterate() or Text::slug()",
         "paragonie/csp-builder": "CSP builder, to use the CSP Middleware"
     },
+    "provide": {
+        "psr/simple-cache-implementation": "^1.0.0"
+    },
     "config": {
         "process-timeout": 900,
         "sort-packages": true,