Bump big.js from 6.1.1 to 6.2.1

Bumps [big.js](https://github.com/MikeMcl/big.js) from 6.1.1 to 6.2.1.
- [Release notes](https://github.com/MikeMcl/big.js/releases)
- [Changelog](https://github.com/MikeMcl/big.js/blob/master/CHANGELOG.md)
- [Commits](MikeMcl/big.js@v6.1.1...v6.2.1)

---
updated-dependencies:
- dependency-name: big.js
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -7,7 +7,7 @@
   "author": "Glenn Rempe <[email protected]>",
   "license": "MIT",
   "dependencies": {
-    "big.js": "^6.1.1",
+    "big.js": "^6.2.1",
     "bootstrap": "3.3.6",
     "bootstrap-validator": "^0.11.9",
     "clipboard": "^2.0.8",

yarn.lock

@@ -2,53 +2,44 @@
 # yarn lockfile v1
 
 
-"big.js@^6.1.1":
-  "integrity" "sha512-1vObw81a8ylZO5ePrtMay0n018TcftpTA5HFKDaSuiUDBo8biRBtjIobw60OpwuvrGk+FsxKamqN4cnmj/eXdg=="
-  "resolved" "https://registry.npmjs.org/big.js/-/big.js-6.1.1.tgz"
-  "version" "6.1.1"
-
-"bootstrap-validator@^0.11.9":
-  "integrity" "sha1-+3BY7vU2I+ePWqeWcCb5j4dalAQ="
-  "resolved" "https://registry.npmjs.org/bootstrap-validator/-/bootstrap-validator-0.11.9.tgz"
-  "version" "0.11.9"
-
-"[email protected]":
-  "integrity" "sha1-jej3SdyKdD8qxbUQ2Yg3Hj2qZYk="
-  "resolved" "https://registry.npmjs.org/bootstrap/-/bootstrap-3.3.6.tgz"
-  "version" "3.3.6"
-
-"clipboard@^2.0.8":
-  "integrity" "sha512-Y6WO0unAIQp5bLmk1zdThRhgJt/x3ks6f30s3oE3H1mgIEU33XyQjEf8gsf6DxC7NPX8Y1SsNWjUjL/ywLnnbQ=="
-  "resolved" "https://registry.npmjs.org/clipboard/-/clipboard-2.0.8.tgz"
-  "version" "2.0.8"
+big.js@^6.2.1:
+  version "6.2.1"
+  resolved "https://registry.yarnpkg.com/big.js/-/big.js-6.2.1.tgz#7205ce763efb17c2e41f26f121c420c6a7c2744f"
+
+bootstrap-validator@^0.11.9:
+  version "0.11.9"
+  resolved "https://registry.npmjs.org/bootstrap-validator/-/bootstrap-validator-0.11.9.tgz"
+
+[email protected]:
+  version "3.3.6"
+  resolved "https://registry.npmjs.org/bootstrap/-/bootstrap-3.3.6.tgz"
+
+clipboard@^2.0.8:
+  version "2.0.8"
+  resolved "https://registry.npmjs.org/clipboard/-/clipboard-2.0.8.tgz"
   dependencies:
-    "good-listener" "^1.2.2"
-    "select" "^1.1.2"
-    "tiny-emitter" "^2.0.0"
-
-"delegate@^3.1.2":
-  "integrity" "sha512-IofjkYBZaZivn0V8nnsMJGBr4jVLxHDheKSW88PyxS5QC4Vo9ZbZVvhzlSxY87fVq3STR6r+4cGepyHkcWOQSw=="
-  "resolved" "https://registry.npmjs.org/delegate/-/delegate-3.2.0.tgz"
-  "version" "3.2.0"
-
-"good-listener@^1.2.2":
-  "integrity" "sha1-1TswzfkxPf+33JoNR3CWqm0UXFA="
-  "resolved" "https://registry.npmjs.org/good-listener/-/good-listener-1.2.2.tgz"
-  "version" "1.2.2"
+    good-listener "^1.2.2"
+    select "^1.1.2"
+    tiny-emitter "^2.0.0"
+
+delegate@^3.1.2:
+  version "3.2.0"
+  resolved "https://registry.npmjs.org/delegate/-/delegate-3.2.0.tgz"
+
+good-listener@^1.2.2:
+  version "1.2.2"
+  resolved "https://registry.npmjs.org/good-listener/-/good-listener-1.2.2.tgz"
   dependencies:
-    "delegate" "^3.1.2"
-
-"jquery@^2.2.0":
-  "integrity" "sha1-LInWiJterFIqfuoywUUhVZxsvwI="
-  "resolved" "https://registry.npmjs.org/jquery/-/jquery-2.2.4.tgz"
-  "version" "2.2.4"
-
-"select@^1.1.2":
-  "integrity" "sha1-DnNQrN7ICxEIUoeG7B1EGNEbOW0="
-  "resolved" "https://registry.npmjs.org/select/-/select-1.1.2.tgz"
-  "version" "1.1.2"
-
-"tiny-emitter@^2.0.0":
-  "integrity" "sha512-2NM0auVBGft5tee/OxP4PI3d8WItkDM+fPnaRAVo6xTDI2knbz9eC5ArWGqtGlYqiH3RU5yMpdyTTO7MguC4ow=="
-  "resolved" "https://registry.npmjs.org/tiny-emitter/-/tiny-emitter-2.0.2.tgz"
-  "version" "2.0.2"
+    delegate "^3.1.2"
+
+jquery@^2.2.0:
+  version "2.2.4"
+  resolved "https://registry.npmjs.org/jquery/-/jquery-2.2.4.tgz"
+
+select@^1.1.2:
+  version "1.1.2"
+  resolved "https://registry.npmjs.org/select/-/select-1.1.2.tgz"
+
+tiny-emitter@^2.0.0:
+  version "2.0.2"
+  resolved "https://registry.npmjs.org/tiny-emitter/-/tiny-emitter-2.0.2.tgz"