Revert "Bump @types/node from 18.15.11 to 20.3.2 (#340)"

This reverts commit 8c78ca2662.

package.json

@@ -61,7 +61,7 @@
   },
   "devDependencies": {
     "@types/jest": "^29.5.2",
-    "@types/node": "^20.3.2",
+    "@types/node": "^18.15.11",
     "jest": "^29.5.0",
     "jest-circus": "^29.5.0",
     "ts-jest": "^29.1.0",

yarn.lock

@@ -1092,10 +1092,10 @@
     expect "^29.0.0"
     pretty-format "^29.0.0"
 
-"@types/node@*", "@types/node@>= 8", "@types/node@^20.3.2":
-  version "20.3.2"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-20.3.2.tgz#fa6a90f2600e052a03c18b8cb3fd83dd4e599898"
-  integrity sha512-vOBLVQeCQfIcF/2Y7eKFTqrMnizK5lRNQ7ykML/5RuwVXVWxYkgwS7xbt4B6fKCUPgbSL5FSsjHQpaGQP/dQmw==
+"@types/node@*", "@types/node@>= 8", "@types/node@^18.15.11":
+  version "18.15.11"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-18.15.11.tgz#b3b790f09cb1696cffcec605de025b088fa4225f"
+  integrity sha512-E5Kwq2n4SbMzQOn6wnmBjuK9ouqlURrcZDVfbo9ftDDTFt3nk7ZKK4GMOzoYgnpQJKcxwQw+lGaBvvlMo0qN/Q==
 
 "@types/prettier@^2.1.5":
   version "2.3.0"