[Security] Bump atob from 2.0.3 to 2.1.2

Bumps [atob](https://github.com/coolaj86/node-browser-compat) from 2.0.3 to 2.1.2. **This update includes security fixes.**
- [Release notes](https://github.com/coolaj86/node-browser-compat/releases)
- [Commits](https://github.com/coolaj86/node-browser-compat/commits)

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

Author: dependabot-support

yarn.lock

@@ -1051,9 +1051,9 @@ asynckit@^0.4.0:
   integrity sha1-x57Zf380y48robyXkLzDZkdLS3k=
 
 atob@^2.0.0:
-  version "2.0.3"
-  resolved "https://registry.yarnpkg.com/atob/-/atob-2.0.3.tgz#19c7a760473774468f20b2d2d03372ad7d4cbf5d"
-  integrity sha1-GcenYEc3dEaPILLS0DNyrX1Mv10=
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/atob/-/atob-2.1.2.tgz#6d9517eb9e030d2436666651e86bd9f6f13533c9"
+  integrity sha512-Wm6ukoaOGJi/73p/cl2GvLjTI5JM1k/O14isD73YML8StrH/7/lRFgmg8nICZgD3bZZvjwCGxtMOD3wWNAu8cg==
 
 autoprefixer@8.6.1:
   version "8.6.1"