chore(deps): Bump pkg-up from 3.1.0 to 4.0.0

Bumps [pkg-up](https://github.com/sindresorhus/pkg-up) from 3.1.0 to 4.0.0.
- [Release notes](https://github.com/sindresorhus/pkg-up/releases)
- [Commits](sindresorhus/package-up@v3.1.0...v4.0.0)

---
updated-dependencies:
- dependency-name: pkg-up
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

packages/core/package.json

@@ -51,7 +51,7 @@
     "npm-check": "^5.9.2",
     "object-path": "^0.11.8",
     "ow": "^0.28.1",
-    "pkg-up": "^3.1.0",
+    "pkg-up": "^4.0.0",
     "promise.hash.helper": "^1.0.8",
     "recast": "^0.20.5",
     "resolve": "^1.22.0",

yarn.lock

@@ -5148,7 +5148,7 @@ find-up@^5.0.0:
     locate-path "^6.0.0"
     path-exists "^4.0.0"
 
-find-up@^6.3.0:
+find-up@^6.2.0, find-up@^6.3.0:
   version "6.3.0"
   resolved "https://registry.yarnpkg.com/find-up/-/find-up-6.3.0.tgz#2abab3d3280b2dc7ac10199ef324c4e002c8c790"
   integrity sha512-v2ZsoEuVHYy8ZIlYqwPe/39Cy+cFDzp4dXPaxNvkEuouymu+2Jbz0PxpKarJHYJTmv2HWT3O382qY8l4jMWthw==
@@ -9488,12 +9488,12 @@ pkg-dir@^4.2.0:
   dependencies:
     find-up "^4.0.0"
 
-pkg-up@^3.1.0:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/pkg-up/-/pkg-up-3.1.0.tgz#100ec235cc150e4fd42519412596a28512a0def5"
-  integrity sha512-nDywThFk1i4BQK4twPQ6TA4RT8bDY96yeuCVBWL3ePARCiEKDRSrNGbFIgUJpLp+XeIR65v8ra7WuJOFUBtkMA==
+pkg-up@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/pkg-up/-/pkg-up-4.0.0.tgz#b2ca5e845979e31497d81520b621f4cdac2dcd75"
+  integrity sha512-N4zdA4sfOe6yCv+ulPCmpnIBQ5I60xfhDr1otdBBhKte9QtEf3bhfrfkW7dTb+IQ0iEx4ZDzas0kc1o5rdWpYg==
   dependencies:
-    find-up "^3.0.0"
+    find-up "^6.2.0"
 
 please-upgrade-node@^3.1.1:
   version "3.2.0"