chore(deps-dev): bump prettier from 2.5.1 to 2.6.0 (mermaid-js#705)

Bumps [prettier](https://github.com/prettier/prettier) from 2.5.1 to 2.6.0.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/main/CHANGELOG.md)
- [Commits](prettier/prettier@2.5.1...2.6.0)

---
updated-dependencies:
- dependency-name: prettier
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -40,7 +40,7 @@
 		"node-html-parser": "^5.3.3",
 		"postcss": "^8.4.8",
 		"postcss-load-config": "^3.1.3",
-		"prettier": "~2.5.1",
+		"prettier": "~2.6.0",
 		"prettier-plugin-svelte": "^2.6.0",
 		"svelte": "^3.46.4",
 		"svelte-preprocess": "^4.10.4",

yarn.lock

@@ -3787,10 +3787,10 @@ prettier-plugin-svelte@^2.6.0:
   resolved "https://registry.yarnpkg.com/prettier-plugin-svelte/-/prettier-plugin-svelte-2.6.0.tgz#0e845b560b55cd1d951d6c50431b4949f8591746"
   integrity sha512-NPSRf6Y5rufRlBleok/pqg4+1FyGsL0zYhkYP6hnueeL1J/uCm3OfOZPsLX4zqD9VAdcXfyEL2PYqGv8ZoOSfA==
 
-prettier@~2.5.1:
-  version "2.5.1"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.5.1.tgz#fff75fa9d519c54cf0fce328c1017d94546bc56a"
-  integrity sha512-vBZcPRUR5MZJwoyi3ZoyQlc1rXeEck8KgeC9AwwOn+exuxLxq5toTRDTSaVrXHxelDMHy9zlicw8u66yxoSUFg==
+prettier@~2.6.0:
+  version "2.6.0"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.6.0.tgz#12f8f504c4d8ddb76475f441337542fa799207d4"
+  integrity sha512-m2FgJibYrBGGgQXNzfd0PuDGShJgRavjUoRCw1mZERIWVSXF0iLzLm+aOqTAbLnC3n6JzUhAA8uZnFVghHJ86A==
 
 pretty-bytes@^5.6.0:
   version "5.6.0"