Merge pull request #12 from silverstripeltd/dependabot/npm_and_yarn/client/immutable-5.1.5

Bump immutable from 5.1.3 to 5.1.5 in /client

Author: blueo

client/yarn.lock

@@ -4142,9 +4142,9 @@ __metadata:
   linkType: hard
 
 "immutable@npm:^5.0.2":
-  version: 5.1.3
-  resolution: "immutable@npm:5.1.3"
-  checksum: 10c0/f094891dcefb9488a84598376c9218ebff3a130c8b807bda3f6b703c45fe7ef238b8bf9a1eb9961db0523c8d7eb116ab6f47166702e4bbb1927ff5884157cd97
+  version: 5.1.5
+  resolution: "immutable@npm:5.1.5"
+  checksum: 10c0/8017ece1578e3c5939ba3305176aee059def1b8a90c7fa2a347ef583ebbd38cbe77ce1bbd786a5fab57e2da00bbcb0493b92e4332cdc4e1fe5cfb09a4688df31
   languageName: node
   linkType: hard