Bump acorn from 6.3.0 to 6.4.1

Bumps [acorn](https://github.com/acornjs/acorn) from 6.3.0 to 6.4.1.
- [Release notes](https://github.com/acornjs/acorn/releases)
- [Commits](acornjs/acorn@6.3.0...6.4.1)

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

Author: dependabot[bot]

yarn.lock

@@ -954,9 +954,9 @@ accepts@~1.3.4, accepts@~1.3.5, accepts@~1.3.7:
     negotiator "0.6.2"
 
 acorn@^6.2.1:
-  version "6.3.0"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.3.0.tgz#0087509119ffa4fc0a0041d1e93a417e68cb856e"
-  integrity sha512-/czfa8BwS88b9gWQVhc8eknunSA2DoJpJyTQkhheIf5E48u1N0R4q/YxxsAeqRrmK9TQ/uYfgLDfZo91UlANIA==
+  version "6.4.1"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.4.1.tgz#531e58ba3f51b9dacb9a6646ca4debf5b14ca474"
+  integrity sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA==
 
 ajv-errors@^1.0.0:
   version "1.0.1"
@@ -3637,10 +3637,10 @@ p-try@^2.0.0:
   resolved "https://registry.yarnpkg.com/p-try/-/p-try-2.2.0.tgz#cb2868540e313d61de58fafbe35ce9004d5540e6"
   integrity sha512-R4nPAVTAU0B9D35/Gk3uJf/7XYbQcyohSKdvAxIRSNghFl4e71hVoGnBNQz9cWaXxO2I10KTC+3jMdvvoKw6dQ==
 
-p5@^0.10.2:
-  version "0.10.2"
-  resolved "https://registry.yarnpkg.com/p5/-/p5-0.10.2.tgz#9437b28e803b9c8a94383c6b5f4d05b13603e1cc"
-  integrity sha512-kZnC7JllCEnEUTB3sv2iETUg1ulNvB60h3MHb63u7W/nCJc3XIlMGXcKk28cuezdQ7TOlKScm0qmWCsol+302Q==
+p5@^0.9.0:
+  version "0.9.0"
+  resolved "https://registry.yarnpkg.com/p5/-/p5-0.9.0.tgz#a4431bf2a0ff6ede06e2c512faddb495c3332504"
+  integrity sha512-N8FzKr9SKofl4f+d9g6oYDRk5JOYgY1bIhCInzNxW7khc1zk7whQIOhaHeijSslfN3rJYfWso6Fn3O/w+TCwLg==
 
 pako@~1.0.5:
   version "1.0.10"
@@ -3992,7 +3992,7 @@ react-router@5.0.1:
     tiny-invariant "^1.0.2"
     tiny-warning "^1.0.0"
 
-react-router@^5.1.2:
+react-router@^5.0.1:
   version "5.1.2"
   resolved "https://registry.yarnpkg.com/react-router/-/react-router-5.1.2.tgz#6ea51d789cb36a6be1ba5f7c0d48dd9e817d3418"
   integrity sha512-yjEuMFy1ONK246B+rsa0cUam5OeAQ8pyclRDgpxuSCrAlJ1qN9uZ5IgyKC7gQg0w8OM50NXHEegPh/ks9YuR2A==