chore(deps): bump brace-expansion in /examples/web-test-runner (#247)

Bumps [brace-expansion](https://github.com/juliangruber/brace-expansion) from 2.0.1 to 2.1.7.
- [Release notes](https://github.com/juliangruber/brace-expansion/releases)
- [Commits](juliangruber/brace-expansion@v2.0.1...v2.1.7)

---
updated-dependencies:
- dependency-name: brace-expansion
  dependency-version: 2.1.7
  dependency-type: indirect
...

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Author: dependabot[bot]

examples/web-test-runner/yarn.lock

@@ -808,9 +808,9 @@ binary-extensions@^2.0.0:
   integrity sha512-Ceh+7ox5qe7LJuLHoY0feh3pHuUDHAcRUeyL2VYghZwfpkNIy/+8Ocg0a3UuSoYzavmylwuLWQOf3hl0jjMMIw==
 
 brace-expansion@^2.0.1:
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-2.0.1.tgz#1edc459e0f0c548486ecf9fc99f2221364b9a0ae"
-  integrity sha512-XnAIvQ8eM+kC6aULx6wuQiwVsnzsi9d3WxzV3FpWTGA19F621kwdbsAcFKXgKUHZWsy+mY6iL1sHTxWEFCytDA==
+  version "2.1.7"
+  resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-2.1.7.tgz#14ea3836731823bb24740225ea43b941b436f9d1"
+  integrity sha512-uZbew1NqdmPDTMJ8ah1y+b+9QEJrfkXFk3RcTQw3X0jW/xRUvFKsg1CfQdSYGdTbXZWExtU3J3ccxtnfw1Fi0g==
   dependencies:
     balanced-match "^1.0.0"