[Security] Bump ssri from 5.0.0 to 5.3.0

Bumps [ssri](https://github.com/zkat/ssri) from 5.0.0 to 5.3.0. **This update includes security fixes.**
- [Release notes](https://github.com/zkat/ssri/releases)
- [Changelog](https://github.com/zkat/ssri/blob/latest/CHANGELOG.md)
- [Commits](https://github.com/zkat/ssri/compare/v5.0.0...v5.3.0)

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

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@pressbooks/pressbooks-aldine",
-  "version": "1.2.1",
+  "version": "1.5.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -17326,15 +17326,6 @@
         }
       }
     },
-    "ssri": {
-      "version": "5.3.0",
-      "resolved": "https://registry.npmjs.org/ssri/-/ssri-5.3.0.tgz",
-      "integrity": "sha512-XRSIPqLij52MtgoQavH/x/dU1qVKtWUAAZeOHsR9c2Ddi4XerFy3mc1alf+dLJKl9EUIm/Ht+EowFkTUOA6GAQ==",
-      "dev": true,
-      "requires": {
-        "safe-buffer": "5.1.1"
-      }
-    },
     "stable": {
       "version": "0.1.8",
       "resolved": "https://registry.npmjs.org/stable/-/stable-0.1.8.tgz",

yarn.lock

@@ -8757,10 +8757,10 @@ sshpk@^1.7.0:
     tweetnacl "~0.14.0"
 
 ssri@^5.0.0:
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/ssri/-/ssri-5.0.0.tgz#13c19390b606c821f2a10d02b351c1729b94d8cf"
+  version "5.3.0"
+  resolved "https://registry.yarnpkg.com/ssri/-/ssri-5.3.0.tgz#ba3872c9c6d33a0704a7d71ff045e5ec48999d06"
   dependencies:
-    safe-buffer "^5.1.0"
+    safe-buffer "^5.1.1"
 
 stackframe@^1.0.3:
   version "1.0.4"