Bump follow-redirects in /fixtures/concurrent/time-slicing

Bumps [follow-redirects](https://github.com/follow-redirects/follow-redirects) from 1.14.0 to 1.15.4.
- [Release notes](https://github.com/follow-redirects/follow-redirects/releases)
- [Commits](follow-redirects/follow-redirects@v1.14.0...v1.15.4)

---
updated-dependencies:
- dependency-name: follow-redirects
  dependency-type: indirect
...

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

Author: dependabot[bot]

fixtures/concurrent/time-slicing/yarn.lock

@@ -3372,9 +3372,9 @@ flatten@^1.0.2:
   integrity sha512-dVsPA/UwQ8+2uoFe5GHtiBMu48dWLTdsuEd7CKGlZlD78r1TTWBvDuFaFGKCo/ZfEr95Uk56vZoX86OsHkUeIg==
 
 follow-redirects@^1.0.0:
-  version "1.14.0"
-  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.14.0.tgz#f5d260f95c5f8c105894491feee5dc8993b402fe"
-  integrity sha512-0vRwd7RKQBTt+mgu87mtYeofLFZpTas2S9zY+jIeuLJMNvudIgF52nr19q40HOwH5RrhWIPuj9puybzSJiRrVg==
+  version "1.15.4"
+  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.15.4.tgz#cdc7d308bf6493126b17ea2191ea0ccf3e535adf"
+  integrity sha512-Cr4D/5wlrb0z9dgERpUL3LrmPKVDsETIJhaCMeDfuFYcqa5bldGV6wBsAN6X/vxlXQtFBMrXdXxdL8CbDTGniw==
 
 for-in@^1.0.1, for-in@^1.0.2:
   version "1.0.2"