fix: upgrade to @amplitude/ua-parser-js@0.7.31 (#535)

Author: dnshi

package.json

@@ -15,7 +15,7 @@
   "main": "amplitude.umd.js",
   "module": "amplitude.esm.js",
   "dependencies": {
-    "@amplitude/ua-parser-js": "0.7.26",
+    "@amplitude/ua-parser-js": "0.7.31",
     "@amplitude/utils": "^1.0.5",
     "@babel/runtime": "^7.3.4",
     "blueimp-md5": "^2.10.0",

yarn.lock

@@ -27,6 +27,11 @@
   resolved "https://registry.yarnpkg.com/@amplitude/ua-parser-js/-/ua-parser-js-0.7.26.tgz#18d889d84d2ba90c248ab6fcd7e3dd07f1c9c86e"
   integrity sha512-62/Rid6YQ7F2KT/5vTre41Y26ivrEoFC8lbrsJZqBKaiXMJWG0YpNv9RgxNSaZS2jPLVQgoB/FFeWxihOLfIcg==
 
+"@amplitude/ua-parser-js@0.7.31":
+  version "0.7.31"
+  resolved "https://registry.yarnpkg.com/@amplitude/ua-parser-js/-/ua-parser-js-0.7.31.tgz#749bf7cb633cfcc7ff3c10805bad7c5f6fbdbc61"
+  integrity sha512-+z8UGRaj13Pt5NDzOnkTBy49HE2CX64jeL0ArB86HAtilpnfkPB7oqkigN7Lf2LxscMg4QhFD7mmCfedh3rqTg==
+
 "@amplitude/utils@^1.0.5":
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/@amplitude/utils/-/utils-1.0.5.tgz#843d96b7965c69213bb1896980bed2c1569fbbed"