build(deps): bump gatsby-plugin-sharp from 2.5.3 to 2.5.4

Author: dependabot-preview[bot]

yarn.lock

@@ -9034,9 +9034,9 @@ gatsby-plugin-react-helmet@^3.1.14:
     "@babel/runtime" "^7.8.7"
 
 gatsby-plugin-sharp@^2.2.37:
-  version "2.5.3"
-  resolved "https://registry.yarnpkg.com/gatsby-plugin-sharp/-/gatsby-plugin-sharp-2.5.3.tgz#7644ab20228f13af5b9fdebc5c1bb22662dfc7c3"
-  integrity sha512-/qx0QJNXsmHudEGlRm6oqkq+X228hGBJ6KjCJpJK5bUwWdhcZRJNar337g/2BXPchaxk1emJTUK9y+qSvVpPvw==
+  version "2.5.4"
+  resolved "https://registry.yarnpkg.com/gatsby-plugin-sharp/-/gatsby-plugin-sharp-2.5.4.tgz#255d5418fa1be510f5a2bead878a1c487f351279"
+  integrity sha512-OVAbo9B21GF3bf0BVLpe7DPm9OpLTsk6lgk9RytzU3yqJCh6NmGTINUN+VPdhnCZNcD17j4FSfMPrquusauQyw==
   dependencies:
     "@babel/runtime" "^7.8.7"
     async "^2.6.3"
@@ -9050,7 +9050,7 @@ gatsby-plugin-sharp@^2.2.37:
     imagemin-webp "^5.1.0"
     lodash "^4.17.15"
     mini-svg-data-uri "^1.1.3"
-    potrace "^2.1.2"
+    potrace "^2.1.5"
     probe-image-size "^4.1.1"
     progress "^2.0.3"
     semver "^5.7.1"