Bump decimal.js from 5.0.8 to 10.2.0 (#38)

Bumps [decimal.js](https://github.com/MikeMcl/decimal.js) from 5.0.8 to 10.2.0.
- [Release notes](https://github.com/MikeMcl/decimal.js/releases)
- [Changelog](https://github.com/MikeMcl/decimal.js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/MikeMcl/decimal.js/compare/v5.0.8...v10.2.0)

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

packages/ripple-binary-codec/package.json

@@ -15,7 +15,7 @@
     "babel-runtime": "^6.6.1",
     "bn.js": "^4.11.3",
     "create-hash": "^1.1.2",
-    "decimal.js": "^5.0.8",
+    "decimal.js": "^10.2.0",
     "inherits": "^2.0.1",
     "lodash": "^4.17.15",
     "ripple-address-codec": "^3.0.4"

packages/ripple-binary-codec/yarn.lock

@@ -1099,10 +1099,10 @@ decamelize@^1.2.0:
   resolved "https://registry.yarnpkg.com/decamelize/-/decamelize-1.2.0.tgz#f6534d15148269b20352e7bee26f501f9a191290"
   integrity sha1-9lNNFRSCabIDUue+4m9QH5oZEpA=
 
-decimal.js@^5.0.8:
-  version "5.0.8"
-  resolved "https://registry.yarnpkg.com/decimal.js/-/decimal.js-5.0.8.tgz#b48c3fb7d73a2d4d4940e0b38f1cd21db5b367ce"
-  integrity sha1-tIw/t9c6LU1JQOCzjxzSHbWzZ84=
+decimal.js@^10.2.0:
+  version "10.2.0"
+  resolved "https://registry.yarnpkg.com/decimal.js/-/decimal.js-10.2.0.tgz#39466113a9e036111d02f82489b5fd6b0b5ed231"
+  integrity sha512-vDPw+rDgn3bZe1+F/pyEwb1oMG2XTlRVgAa6B4KccTEpYgF8w6eQllVbQcfIJnZyvzFtFpxnpGtx8dd7DJp/Rw==
 
 decode-uri-component@^0.2.0:
   version "0.2.0"