chore(deps): bump lodash from 4.17.14 to 4.18.1 in /site

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.14 to 4.18.1.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.14...4.18.1)

---
updated-dependencies:
- dependency-name: lodash
  dependency-version: 4.18.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

site/gatsby-theme-base/package.json

@@ -13,7 +13,7 @@
     "gatsby-plugin-react-helmet": "^3.0.2",
     "gatsby-plugin-svgr": "^2.0.1",
     "less": "^3.9.0",
-    "lodash": "^4.17.11",
+    "lodash": "^4.18.1",
     "polished": "^2.3.3",
     "prop-types": "^15.6.2",
     "react": "^16.8.6",

site/yarn.lock

@@ -10010,15 +10010,10 @@ lodash.uniq@^4.5.0:
   resolved "https://registry.yarnpkg.com/lodash.uniq/-/lodash.uniq-4.5.0.tgz#d0225373aeb652adc1bc82e4945339a842754773"
   integrity sha1-0CJTc662Uq3BvILklFM5qEJ1R3M=
 
-lodash@^4.11.1, lodash@^4.15.0, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.12, lodash@^4.17.14, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.3.0:
-  version "4.17.14"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.14.tgz#9ce487ae66c96254fe20b599f21b6816028078ba"
-  integrity sha512-mmKYbW3GLuJeX+iGP+Y7Gp1AiGHGbXHCOh/jZmrawMmsE7MS4znI3RL2FsjbqOyMayHInjOeykW7PEajUk1/xw==
-
-lodash@^4.17.13, lodash@^4.17.15, lodash@^4.2.1:
-  version "4.17.15"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
-  integrity sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==
+lodash@^4.11.1, lodash@^4.15.0, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.12, lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.18.1, lodash@^4.2.1, lodash@^4.3.0:
+  version "4.18.1"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.18.1.tgz#ff2b66c1f6326d59513de2407bf881439812771c"
+  integrity sha512-dMInicTPVE8d1e5otfwmmjlxkZoUpiVLwyeTdUsi/Caj/gfzzblBcCE5sRHV/AsjuCmxWrte2TNGSYuCeCq+0Q==
 
 log-process-errors@^5.1.1:
   version "5.1.2"