Update dependency @ember/string to v3.1.1

Author: renovate[bot]

package.json

@@ -37,7 +37,7 @@
   },
   "devDependencies": {
     "@ember/optional-features": "2.0.0",
-    "@ember/string": "3.0.1",
+    "@ember/string": "3.1.1",
     "@ember/test-helpers": "2.9.3",
     "@embroider/test-setup": "2.1.1",
     "@glimmer/component": "1.1.2",

yarn.lock

@@ -1065,10 +1065,10 @@
     ember-cli-babel "^7.26.11"
     ember-modifier-manager-polyfill "^1.2.0"
 
-"@ember/string@3.0.1":
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/@ember/string/-/string-3.0.1.tgz#42cf032031a4432c2dd69c327ae1876d2c13df9c"
-  integrity sha512-ntnmXS+upOWVXE+rVw2l03DjdMnaGdWbYVUxUBuPJqnIGZu2XFRsoXc7E6mOw62s8i1Xh1RgTuFHN41QGIolEQ==
+"@ember/string@3.1.1":
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/@ember/string/-/string-3.1.1.tgz#0a5ac0d1e4925259e41d5c8d55ef616117d47ff0"
+  integrity sha512-UbXJ+k3QOrYN4SRPHgXCqYIJ+yWWUg1+vr0H4DhdQPTy8LJfyqwZ2tc5uqpSSnEXE+/1KopHBE5J8GDagAg5cg==
   dependencies:
     ember-cli-babel "^7.26.6"