build(deps): bump immer from 8.0.4 to 9.0.6 in /packages/web

Bumps [immer](https://github.com/immerjs/immer) from 8.0.4 to 9.0.6.
- [Release notes](https://github.com/immerjs/immer/releases)
- [Commits](immerjs/immer@v8.0.4...v9.0.6)

---
updated-dependencies:
- dependency-name: immer
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

packages/web/package.json

@@ -8,7 +8,7 @@
     "date-fns": "2.0.0-beta.3",
     "date-fns-tz": "1.1.4",
     "history": "4.9.0",
-    "immer": "8.0.4",
+    "immer": "9.0.6",
     "polished": "3.4.1",
     "prop-types": "15.7.2",
     "react": "16.8.6",

packages/web/yarn.lock

@@ -5962,10 +5962,10 @@ [email protected]:
   resolved "https://registry.yarnpkg.com/immer/-/immer-1.10.0.tgz#bad67605ba9c810275d91e1c2a47d4582e98286d"
   integrity sha512-O3sR1/opvCDGLEVcvrGTMtLac8GJ5IwZC4puPrLuRj3l7ICKvkmA0vGuU9OW8mV9WIBRnaxp5GJh9IEAaNOoYg==
 
-immer@8.0.4:
-  version "8.0.4"
-  resolved "https://registry.yarnpkg.com/immer/-/immer-8.0.4.tgz#3a21605a4e2dded852fb2afd208ad50969737b7a"
-  integrity sha512-jMfL18P+/6P6epANRvRk6q8t+3gGhqsJ9EuJ25AXE+9bNTYtssvzeYbEd0mXRYWCmmXSIbnlpz6vd6iJlmGGGQ==
+immer@9.0.6:
+  version "9.0.6"
+  resolved "https://registry.yarnpkg.com/immer/-/immer-9.0.6.tgz#7a96bf2674d06c8143e327cbf73539388ddf1a73"
+  integrity sha512-G95ivKpy+EvVAnAab4fVa4YGYn24J1SpEktnJX7JJ45Bd7xqME/SCplFzYFmTbrkwZbQ4xJK1xMTUYBkN6pWsQ==
 
 import-cwd@^2.0.0:
   version "2.1.0"