Update typescript-eslint monorepo to v3 (major) (#589)

renovate[bot] · renovate-bot · JoshuaKGoldberg · web-flow · commit f4fb3a60f945 · 2020-05-23T03:40:51.000-04:00
* Update typescript-eslint monorepo to v3

* Applied suggestion for DeepPartial

Co-authored-by: Renovate Bot &lt;bot@renovateapp.com&gt;
Co-authored-by: Josh Goldberg &lt;me@joshuakgoldberg.com&gt;
diff --git a/package-lock.json b/package-lock.json
diff --git a/package.json b/package.json
@@ -28,8 +28,8 @@
         "@types/glob": "7.1.1",
         "@types/jest": "25.2.3",
         "@types/node": "12.12.21",
-        "@typescript-eslint/eslint-plugin": "2.34.0",
-        "@typescript-eslint/parser": "2.34.0",
+        "@typescript-eslint/eslint-plugin": "3.0.0",
+        "@typescript-eslint/parser": "3.0.0",
         "babel-jest": "26.0.1",
         "eslint": "7.1.0",
         "husky": "4.2.5",
diff --git a/src/input/findReportedConfiguration.ts b/src/input/findReportedConfiguration.ts
@@ -1,7 +1,7 @@
 import { Exec } from "../adapters/exec";
 
 export type DeepPartial<T> = {
-    [P in keyof T]: T[P] extends {} ? DeepPartial<T[P]> : T[P];
+    [P in keyof T]?: T[P] extends Record<P, T[P]> ? DeepPartial<T[P]> : T[P];
 };
 
 export type FindReportedConfigurationDependencies = {
