Bump terser from 4.6.12 to 4.8.1

Bumps [terser](https://github.com/terser/terser) from 4.6.12 to 4.8.1.
- [Release notes](https://github.com/terser/terser/releases)
- [Changelog](https://github.com/terser/terser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/terser/terser/commits)

---
updated-dependencies:
- dependency-name: terser
  dependency-type: indirect
...

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

package-lock.json

@@ -12880,9 +12880,9 @@
       }
     },
     "terser": {
-      "version": "4.6.12",
+      "version": "4.8.1",
-      "resolved": "https://registry.npm.taobao.org/terser/download/terser-4.6.12.tgz?cache=0&sync_timestamp=1587902079221&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fterser%2Fdownload%2Fterser-4.6.12.tgz",
+      "resolved": "https://registry.npmjs.org/terser/-/terser-4.8.1.tgz",
-      "integrity": "sha1-RLmK74cD/bCaNJG/ebQ/r/xbT+4=",
+      "integrity": "sha512-4GnLC0x667eJG0ewJTa6z/yXrbLGv80D9Ru6HIpCQmO+Q4PfEtBFi0ObSckqwL6VyQv/7ENJieXHo2ANmdQwgw==",
       "requires": {
         "commander": "^2.20.0",
         "source-map": "~0.6.1",

yarn.lock

@@ -2580,9 +2580,9 @@ bson@^4.0.2:
     long "^4.0.0"
 
 buffer-from@^1.0.0:
-  version "1.1.1"
+  version "1.1.2"
-  resolved "https://registry.npm.taobao.org/buffer-from/download/buffer-from-1.1.1.tgz#32713bc028f75c02fdb710d7c7bcec1f2c6070ef"
+  resolved "https://registry.yarnpkg.com/buffer-from/-/buffer-from-1.1.2.tgz#2b146a6fd72e80b4f55d255f35ed59a3a9a41bd5"
-  integrity sha1-MnE7wCj3XAL9txDXx7zsHyxgcO8=
+  integrity sha512-E+XQCRwSbaaiChtv6k6Dwgc+bx+Bs6vuKJHHl5kox/BaKbhiXzqQOwK4cO22yElGp2OCmjwVhT3HmxgyPGnJfQ==
 
 buffer-indexof@^1.0.0:
   version "1.1.1"
@@ -9690,9 +9690,9 @@ source-map-resolve@^0.5.0, source-map-resolve@^0.5.2:
     urix "^0.1.0"
 
 source-map-support@^0.5.6, source-map-support@~0.5.12:
-  version "0.5.19"
+  version "0.5.21"
-  resolved "https://registry.npm.taobao.org/source-map-support/download/source-map-support-0.5.19.tgz?cache=0&sync_timestamp=1587719517036&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fsource-map-support%2Fdownload%2Fsource-map-support-0.5.19.tgz#a98b62f86dcaf4f67399648c085291ab9e8fed61"
+  resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.21.tgz#04fe7c7f9e1ed2d662233c28cb2b35b9f63f6e4f"
-  integrity sha1-qYti+G3K9PZzmWSMCFKRq56P7WE=
+  integrity sha512-uBHU3L3czsIyYXKX88fdrGovxdSCoTGDRZ6SYXtSRxLZUzHg5P/66Ht6uoUlHu9EZod+inXhKo3qQgwXUT/y1w==
   dependencies:
     buffer-from "^1.0.0"
     source-map "^0.6.0"
@@ -10182,9 +10182,9 @@ terser-webpack-plugin@^1.4.3:
     worker-farm "^1.7.0"
 
 terser@^4.1.2, terser@^4.4.3, terser@^4.6.3:
-  version "4.7.0"
+  version "4.8.1"
-  resolved "https://registry.npm.taobao.org/terser/download/terser-4.7.0.tgz?cache=0&sync_timestamp=1589825699609&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fterser%2Fdownload%2Fterser-4.7.0.tgz#15852cf1a08e3256a80428e865a2fa893ffba006"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-4.8.1.tgz#a00e5634562de2239fd404c649051bf6fc21144f"
-  integrity sha1-FYUs8aCOMlaoBCjoZaL6iT/7oAY=
+  integrity sha512-4GnLC0x667eJG0ewJTa6z/yXrbLGv80D9Ru6HIpCQmO+Q4PfEtBFi0ObSckqwL6VyQv/7ENJieXHo2ANmdQwgw==
   dependencies:
     commander "^2.20.0"
     source-map "~0.6.1"