Bump gatsby-plugin-manifest from 2.4.17 to 2.4.18

Bumps [gatsby-plugin-manifest](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-manifest) from 2.4.17 to 2.4.18.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-plugin-manifest/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/gatsby-plugin-manifest@2.4.18/packages/gatsby-plugin-manifest)

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

package.json

@@ -9,7 +9,7 @@
     "classnames": "^2.2.6",
     "gatsby": "^2.24.1",
     "gatsby-image": "^2.4.13",
-    "gatsby-plugin-manifest": "^2.4.17",
+    "gatsby-plugin-manifest": "^2.4.18",
     "gatsby-plugin-matomo": "^0.8.3",
     "gatsby-plugin-react-helmet": "^3.3.10",
     "gatsby-plugin-remove-serviceworker": "^1.0.0",

yarn.lock

@@ -6407,13 +6407,13 @@ gatsby-page-utils@^0.2.17:
     lodash "^4.17.15"
     micromatch "^3.1.10"
 
-gatsby-plugin-manifest@^2.4.17:
-  version "2.4.17"
-  resolved "https://registry.yarnpkg.com/gatsby-plugin-manifest/-/gatsby-plugin-manifest-2.4.17.tgz#22b7dce25edf03338e8954ad847cd94adeaec31a"
-  integrity sha512-WKzYDIrXPIXrXISEHcz/up5dnwDzfejlTtfIKpi/yqHPaWUX07Qpw5f9BmWz3nayJmx1Yp3/5ysJgekhQKqAGA==
+gatsby-plugin-manifest@^2.4.18:
+  version "2.4.18"
+  resolved "https://registry.yarnpkg.com/gatsby-plugin-manifest/-/gatsby-plugin-manifest-2.4.18.tgz#7853efc25dd86e7af760026d675ffb3fd6bac59e"
+  integrity sha512-8nsCHLTCAqTg49pft3JaIqAsKlUMC1QA4/gm/Dxxm+kXj/LgfD/ZXjzh9EaBwtnlrWvuuz+Pr/WDEk1d2BMmdQ==
   dependencies:
     "@babel/runtime" "^7.10.3"
-    gatsby-core-utils "^1.3.11"
+    gatsby-core-utils "^1.3.12"
     semver "^5.7.1"
     sharp "^0.25.1"