upgrade uuid dep to support bundler tree shaking

See https://github.com/uuidjs/uuid/blob/master/README_js.md#deep-requires-now-deprecated

From the above document, the motivation for upgrading:

As of [email protected] this library now provides ECMAScript modules builds,
which allow packagers like Webpack and Rollup to do "tree-shaking" to
remove dead code.

Author: gwu

index.js

@@ -6,7 +6,7 @@ const looselyValidate = require('@segment/loosely-validate-event')
 const axios = require('axios')
 const axiosRetry = require('axios-retry')
 const ms = require('ms')
-const uuid = require('uuid/v4')
+const { v4: uuid } = require('uuid')
 const md5 = require('md5')
 const version = require('./package.json').version
 const isString = require('lodash.isstring')

package.json

@@ -40,7 +40,7 @@
     "md5": "^2.2.1",
     "ms": "^2.0.0",
     "remove-trailing-slash": "^0.1.0",
-    "uuid": "^3.2.1"
+    "uuid": "^8.3.2"
   },
   "devDependencies": {
     "ava": "^0.25.0",

yarn.lock

@@ -6179,10 +6179,15 @@ [email protected]:
   resolved "https://registry.yarnpkg.com/utils-merge/-/utils-merge-1.0.1.tgz#9f95710f50a267947b2ccc124741c1028427e713"
   integrity sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM=
 
-uuid@^3.0.1, uuid@^3.2.1, uuid@^3.3.2:
+uuid@^3.0.1, uuid@^3.3.2:
   version "3.3.2"
   resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.3.2.tgz#1b4af4955eb3077c501c23872fc6513811587131"
 
+uuid@^8.3.2:
+  version "8.3.2"
+  resolved "https://registry.yarnpkg.com/uuid/-/uuid-8.3.2.tgz#80d5b5ced271bb9af6c445f21a1a04c606cefbe2"
+  integrity sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg==
+
 validate-npm-package-license@^3.0.1:
   version "3.0.4"
   resolved "https://registry.yarnpkg.com/validate-npm-package-license/-/validate-npm-package-license-3.0.4.tgz#fc91f6b9c7ba15c857f4cb2c5defeec39d4f410a"