Update Terser to v5.10.0, fix minification issues (vercel#33045)

Bumping Terser from v5.7.1 to v5.10.0 fixes some minification issues:
- I specifically encountered this bug, where a boolean condition was flipped when a nullish coalescing operator was involved: terser/terser#1045
- See [Terser's changelog](https://github.com/terser/terser/blob/master/CHANGELOG.md) for more fixes

## Bug

- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have helpful link attached, see `contributing.md`

## Feature

- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have helpful link attached, see `contributing.md`

## Documentation / Examples

- [x] Make sure the linting passes by running `yarn lint`

packages/next/package.json

@@ -252,7 +252,7 @@
     "string_decoder": "1.3.0",
     "strip-ansi": "6.0.0",
     "taskr": "1.1.0",
-    "terser": "5.7.1",
+    "terser": "5.10.0",
     "text-table": "0.2.0",
     "timers-browserify": "2.0.12",
     "tty-browserify": "0.0.1",

yarn.lock

@@ -19465,19 +19465,19 @@ terser-webpack-plugin@^5.1.3:
     source-map "^0.6.1"
     terser "^5.7.2"
 
-terser@5.5.1, terser@^5.0.0:
-  version "5.5.1"
-  resolved "https://registry.yarnpkg.com/terser/-/terser-5.5.1.tgz#540caa25139d6f496fdea056e414284886fb2289"
-  integrity sha512-6VGWZNVP2KTUcltUQJ25TtNjx/XgdDsBDKGt8nN0MpydU36LmbPPcMBd2kmtZNNGVVDLg44k7GKeHHj+4zPIBQ==
+terser@5.10.0:
+  version "5.10.0"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-5.10.0.tgz#b86390809c0389105eb0a0b62397563096ddafcc"
+  integrity sha512-AMmF99DMfEDiRJfxfY5jj5wNH/bYO09cniSqhfoyxc8sFoYIgkJy86G04UoZU5VjlpnplVu0K6Tx6E9b5+DlHA==
   dependencies:
     commander "^2.20.0"
     source-map "~0.7.2"
-    source-map-support "~0.5.19"
+    source-map-support "~0.5.20"
 
-terser@5.7.1:
-  version "5.7.1"
-  resolved "https://registry.yarnpkg.com/terser/-/terser-5.7.1.tgz#2dc7a61009b66bb638305cb2a824763b116bf784"
-  integrity sha512-b3e+d5JbHAe/JSjwsC3Zn55wsBIM7AsHLjKxT31kGCldgbpFePaFo+PiddtO6uwRZWRw7sPXmAN8dTW61xmnSg==
+terser@5.5.1, terser@^5.0.0:
+  version "5.5.1"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-5.5.1.tgz#540caa25139d6f496fdea056e414284886fb2289"
+  integrity sha512-6VGWZNVP2KTUcltUQJ25TtNjx/XgdDsBDKGt8nN0MpydU36LmbPPcMBd2kmtZNNGVVDLg44k7GKeHHj+4zPIBQ==
   dependencies:
     commander "^2.20.0"
     source-map "~0.7.2"