[Security] Bump atob from 2.0.3 to 2.1.2 (#14)

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>

yarn.lock

@@ -118,8 +118,8 @@ assign-symbols@^1.0.0:
   resolved "https://registry.yarnpkg.com/assign-symbols/-/assign-symbols-1.0.0.tgz#59667f41fadd4f20ccbc2bb96b8d4f7f78ec0367"
 
 atob@^2.0.0:
-  version "2.0.3"
-  resolved "https://registry.yarnpkg.com/atob/-/atob-2.0.3.tgz#19c7a760473774468f20b2d2d03372ad7d4cbf5d"
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/atob/-/atob-2.1.2.tgz#6d9517eb9e030d2436666651e86bd9f6f13533c9"
 
 babel-code-frame@^6.22.0:
   version "6.26.0"