Bump buffer from 5.0.8 to 5.2.1

Bumps [buffer](https://github.com/feross/buffer) from 5.0.8 to 5.2.1.
- [Release notes](https://github.com/feross/buffer/releases)
- [Commits](feross/buffer@v5.0.8...v5.2.1)

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

package.json

@@ -24,7 +24,7 @@
   },
   "dependencies": {
     "bootstrap": "~3.2.0",
-    "buffer": "~5.0.2",
+    "buffer": "~5.2.1",
     "commander": "^2.11.0",
     "data-uri-to-buffer": "^2.0.0",
     "downloadjs": "^1.4.7",

yarn.lock

@@ -792,22 +792,14 @@ buffer@^4.1.0:
     ieee754 "^1.1.4"
     isarray "^1.0.0"
 
-buffer@^5.0.2:
+buffer@^5.0.2, buffer@~5.2.1:
   version "5.2.1"
   resolved "https://registry.yarnpkg.com/buffer/-/buffer-5.2.1.tgz#dd57fa0f109ac59c602479044dca7b8b3d0b71d6"
   integrity sha512-c+Ko0loDaFfuPWiL02ls9Xd3GO3cPVmUobQ6t3rXNUk304u6hGq+8N/kFi+QEIKhzK3uwolVhLzszmfLmMLnqg==
   dependencies:
     base64-js "^1.0.2"
     ieee754 "^1.1.4"
 
-buffer@~5.0.2:
-  version "5.0.8"
-  resolved "https://registry.yarnpkg.com/buffer/-/buffer-5.0.8.tgz#84daa52e7cf2fa8ce4195bc5cf0f7809e0930b24"
-  integrity sha512-xXvjQhVNz50v2nPeoOsNqWCLGfiv4ji/gXZM28jnVwdLJxH4mFyqgqCKfaK9zf1KUbG6zTkjLOy7ou+jSMarGA==
-  dependencies:
-    base64-js "^1.0.2"
-    ieee754 "^1.1.4"
-
 builtin-modules@^1.0.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/builtin-modules/-/builtin-modules-1.1.1.tgz#270f076c5a72c02f5b65a47df94c5fe3a278892f"