Bump buffer from 4.9.2 to 6.0.3

Bumps [buffer](https://github.com/feross/buffer) from 4.9.2 to 6.0.3.
- [Release notes](https://github.com/feross/buffer/releases)
- [Commits](feross/buffer@v4.9.2...v6.0.3)

Signed-off-by: dependabot-preview[bot] <[email protected]>

package.json

@@ -34,7 +34,7 @@
     "big.js": "^5.2.2",
     "bitcoin-convert": "^1.0.4",
     "browserify-zlib": "~0.1.4",
-    "buffer": "^4.9.1",
+    "buffer": "^6.0.3",
     "console-browserify": "^1.1.0",
     "constants-browserify": "^1.0.0",
     "crypto-js": "^3.1.9-1",

yarn.lock

@@ -2857,6 +2857,14 @@ buffer@^5.0.0, buffer@^5.4.3:
     base64-js "^1.0.2"
     ieee754 "^1.1.4"
 
+buffer@^6.0.3:
+  version "6.0.3"
+  resolved "https://registry.yarnpkg.com/buffer/-/buffer-6.0.3.tgz#2ace578459cc8fbe2a70aaa8f52ee63b6a74c6c6"
+  integrity sha512-FTiCpNxtwiZZHEZbcbTIcZjERVICn9yq/pDFkTl95/AxzD1naBctN7YO68riM/gLSDY7sdrMby8hofADYuuqOA==
+  dependencies:
+    base64-js "^1.3.1"
+    ieee754 "^1.2.1"
+
 [email protected]:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/bytes/-/bytes-3.0.0.tgz#d32815404d689699f85a4ea4fa8755dd13a96048"
@@ -4846,9 +4854,10 @@ [email protected], iconv-lite@^0.4.17, iconv-lite@^0.4.24, iconv-lite@~0.4.13:
   dependencies:
     safer-buffer ">= 2.1.2 < 3"
 
-ieee754@^1.1.4:
-  version "1.1.13"
-  resolved "https://registry.yarnpkg.com/ieee754/-/ieee754-1.1.13.tgz#ec168558e95aa181fd87d37f55c32bbcb6708b84"
+ieee754@^1.1.4, ieee754@^1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/ieee754/-/ieee754-1.2.1.tgz#8eb7a10a63fff25d15a57b001586d177d1b0d352"
+  integrity sha512-dcyqhDvX1C46lXZcVqCpK+FtMRQVdIMN6/Df5js2zouUsqG7I6sFxitIC+7KYK29KdXOLHdu9zL4sFnoVQnqaA==
 
 ignore@^4.0.6:
   version "4.0.6"