build(deps-dev): bump sign-addon from 3.1.0 to 3.2.0 in /web

Bumps [sign-addon](https://github.com/mozilla/sign-addon) from 3.1.0 to 3.2.0.
- [Release notes](https://github.com/mozilla/sign-addon/releases)
- [Commits](https://github.com/mozilla/sign-addon/compare/3.1.0...3.2.0)

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

web/package-lock.json

@@ -5328,9 +5328,9 @@
       }
     },
     "core-js": {
-      "version": "3.6.5",
-      "resolved": "https://registry.npmjs.org/core-js/-/core-js-3.6.5.tgz",
-      "integrity": "sha512-vZVEEwZoIsI+vPEuoF9Iqf5H7/M3eeQqWlQnYa8FSKKePuYTf5MWnxb5SDAzCa60b3JBRS5g9b+Dq7b1y/RCrA==",
+      "version": "3.8.2",
+      "resolved": "https://registry.npmjs.org/core-js/-/core-js-3.8.2.tgz",
+      "integrity": "sha512-FfApuSRgrR6G5s58casCBd9M2k+4ikuu4wbW6pJyYU7bd9zvFc9qf7vr5xmrZOhT9nn+8uwlH1oRR9jTnFoA3A==",
       "dev": true
     },
     "core-util-is": {
@@ -11848,13 +11848,13 @@
       "dev": true
     },
     "sign-addon": {
-      "version": "3.1.0",
-      "resolved": "https://registry.npmjs.org/sign-addon/-/sign-addon-3.1.0.tgz",
-      "integrity": "sha512-zZ7nKc5/3QWM3skYBosGDvYQf2jkKhW2u8BELrZoN1wgCSOnwsV9T47Vx9uaNbA3CyZ+V9XSA0tDVHoV1QfVPw==",
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/sign-addon/-/sign-addon-3.2.0.tgz",
+      "integrity": "sha512-ecLV18H/nPu4ZPhRG9CpCzrhY61bvAT7HCIDfBVqnNj0U2o7CE4qZryuq2uqAMZ8gSKJ48I96Ptq00Xu0MiHoQ==",
       "dev": true,
       "requires": {
         "common-tags": "1.8.0",
-        "core-js": "3.6.5",
+        "core-js": "3.8.2",
         "deepcopy": "2.1.0",
         "es6-error": "4.1.1",
         "es6-promisify": "6.1.1",