Upgrade TypeScript to 4.2.4 (this doesn't fix the build error)

Core problem is that `yarn berry`, when using `pnp` mode, requires
a patch to `typescript`. But we're using the `node-modules` linker.
Need to upgrade yarn I think

Tracking issues:
    - yarnpkg/berry#2935
    - yarnpkg/berry#2543
    - yarnpkg/berry#2711

package.json

@@ -26,7 +26,7 @@
   "devDependencies": {
     "npm-run-all": "^4.1.5",
     "prettier": "^2.2.1",
-    "typescript": "4.2.3"
+    "typescript": "4.2.4"
   },
   "dependencies": {
     "next-seo": "^4.4.0",

yarn-public-workspace.lock

@@ -9189,7 +9189,7 @@ fsevents@~2.3.1:
     react-helmet: ^6.0.0
     remark-sectionize: ^1.1.1
     rss: ^1.2.2
-    typescript: 4.2.3
+    typescript: 4.2.4
   languageName: unknown
   linkType: soft
 
@@ -9919,23 +9919,23 @@ fsevents@~2.3.1:
   languageName: node
   linkType: hard
 
-[email protected].3:
-  version: 4.2.3
-  resolution: "typescript@npm:4.2.3"
+[email protected].4:
+  version: 4.2.4
+  resolution: "typescript@npm:4.2.4"
   bin:
     tsc: bin/tsc
     tsserver: bin/tsserver
-  checksum: 06e8470f317db6f5e2fce809b20eb84a67a7d8179057abff36e5427bd1b891bd08e54581ff81f0fa36aef9b6d1eb0f54eaf6e2643c6dbd4e37a0adcc41eed256
+  checksum: edaede2fa77f56b7fba80ee624a2368ab1216e75b0434d968ccb47ab0a5e2f6d94f848b3b111c1237dd71e988cd376af26370dcdad3b94355c76e759f0dd0a1e
   languageName: node
   linkType: hard
 
-"typescript@patch:[email protected].3#builtin<compat/typescript>":
-  version: 4.2.3
-  resolution: "typescript@patch:typescript@npm%3A4.2.3#builtin<compat/typescript>::version=4.2.3&hash=a45b0e"
+"typescript@patch:[email protected].4#builtin<compat/typescript>":
+  version: 4.2.4
+  resolution: "typescript@patch:typescript@npm%3A4.2.4#builtin<compat/typescript>::version=4.2.4&hash=a45b0e"
   bin:
     tsc: bin/tsc
     tsserver: bin/tsserver
-  checksum: a8956044aabf730699bcc3c2475efdd3f35e509329325cf60b4989761d4c2188e2c474183e2cf92b8c201fcf976814a5a16f144508b2a832643c4f972d0ab803
+  checksum: 3be44317593182e8ce494c114e7ad9b0bb2553a22f3085cc6da4f0a36912c20850daa9be4c898af2ab6fc8b12f430c1c9e46ac715721867cd38643f2350d3ef9
   languageName: node
   linkType: hard