chore(deps): bump gatsby-source-filesystem from 2.1.29 to 2.1.31 in /www

Bumps [gatsby-source-filesystem](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-source-filesystem) from 2.1.29 to 2.1.31.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-source-filesystem/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/[email protected]/packages/gatsby-source-filesystem)

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

www/package.json

@@ -30,7 +30,7 @@
     "gatsby-plugin-mdx": "^1.0.49",
     "gatsby-plugin-sass": "^2.1.17",
     "gatsby-remark-prismjs": "^3.3.17",
-    "gatsby-source-filesystem": "2.1.29",
+    "gatsby-source-filesystem": "2.1.31",
     "gatsby-transformer-react-docgen": "^4.1.3",
     "gatsby-transformer-remark": "^2.6.27",
     "gh-pages": "^2.1.1",

www/yarn.lock

@@ -754,10 +754,10 @@
     "@babel/plugin-transform-react-jsx-self" "^7.0.0"
     "@babel/plugin-transform-react-jsx-source" "^7.0.0"
 
-"@babel/runtime@^7.0.0", "@babel/runtime@^7.1.2", "@babel/runtime@^7.4.2", "@babel/runtime@^7.4.5", "@babel/runtime@^7.5.5", "@babel/runtime@^7.6.2":
-  version "7.6.2"
-  resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.6.2.tgz#c3d6e41b304ef10dcf13777a33e7694ec4a9a6dd"
-  integrity sha512-EXxN64agfUqqIGeEjI5dL5z0Sw0ZwWo1mLTi4mQowCZ42O59b7DRpZAnTC6OqdF28wMBMFKNb/4uFGrVaigSpg==
+"@babel/runtime@^7.0.0", "@babel/runtime@^7.1.2", "@babel/runtime@^7.4.2", "@babel/runtime@^7.4.5", "@babel/runtime@^7.5.5", "@babel/runtime@^7.6.2", "@babel/runtime@^7.6.3":
+  version "7.6.3"
+  resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.6.3.tgz#935122c74c73d2240cafd32ddb5fc2a6cd35cf1f"
+  integrity sha512-kq6anf9JGjW8Nt5rYfEuGRaEAaH1mkv3Bbu6rYvLOpPh/RusSJXuKPEAoZ7L7gybZkchE8+NV5g9vKF4AGAtsA==
   dependencies:
     regenerator-runtime "^0.13.2"
 
@@ -5086,10 +5086,10 @@ gatsby-cli@^2.7.56:
     ink "^2.5.0"
     ink-spinner "^3.0.1"
 
-gatsby-core-utils@^1.0.12:
-  version "1.0.12"
-  resolved "https://registry.yarnpkg.com/gatsby-core-utils/-/gatsby-core-utils-1.0.12.tgz#72f38677b9894d701b55f12b0c443a72274ae1c6"
-  integrity sha512-Ryh0ILzG6zuYA88irnFQPKGe0NwEBh30FqAp7KNyYgsiOB41CSD0JfjIlFUgkU/gAoLlZKXyeFwbq3SVEBwNoA==
+gatsby-core-utils@^1.0.12, gatsby-core-utils@^1.0.13:
+  version "1.0.13"
+  resolved "https://registry.yarnpkg.com/gatsby-core-utils/-/gatsby-core-utils-1.0.13.tgz#fdd89f70eac6f8eb08d53db34186a837aef20a66"
+  integrity sha512-vRbsebZxQASxUNfWqoSP3i8r87ibgpksKCqdCkoQBXJwjVKd8VM2dfScheaHE2OuxFZa2AEA0uyCGSiaF6yzUA==
 
 gatsby-graphiql-explorer@^0.2.22:
   version "0.2.22"
@@ -5214,18 +5214,18 @@ gatsby-remark-prismjs@^3.3.17:
     parse-numeric-range "^0.0.2"
     unist-util-visit "^1.4.1"
 
-[email protected].29:
-  version "2.1.29"
-  resolved "https://registry.yarnpkg.com/gatsby-source-filesystem/-/gatsby-source-filesystem-2.1.29.tgz#ca4dd77c850152b1a57d91b6535930b67b35fe73"
-  integrity sha512-MRJ3jkGhxJDztXzw0oeh4hizLzs5hGIc/Jq5gwUi5NcrKCR5HDbOFvVVE8irfkoNh7TuvHf6sjWFzDgzlUADgw==
+[email protected].31:
+  version "2.1.31"
+  resolved "https://registry.yarnpkg.com/gatsby-source-filesystem/-/gatsby-source-filesystem-2.1.31.tgz#60bd38c8d190a34d18268d143a4c946f333a021b"
+  integrity sha512-+P/2jKYKH3UWDgvvO2XpYy9izjXGAsvekomykf8usJpGMu+mLMEMmmM0CPEGMCMxo1HB74xEMjYxtw9KCtUaEw==
   dependencies:
-    "@babel/runtime" "^7.6.2"
+    "@babel/runtime" "^7.6.3"
     better-queue "^3.8.10"
     bluebird "^3.7.0"
     chokidar "3.2.1"
     file-type "^12.3.0"
     fs-extra "^8.1.0"
-    gatsby-core-utils "^1.0.12"
+    gatsby-core-utils "^1.0.13"
     got "^7.1.0"
     md5-file "^3.2.3"
     mime "^2.4.4"