[Security] Bump stringstream from 0.0.5 to 0.0.6

Bumps [stringstream](https://github.com/mhart/StringStream) from 0.0.5 to 0.0.6. **This update includes security fixes.**
- [Release notes](https://github.com/mhart/StringStream/releases)
- [Commits](https://github.com/mhart/StringStream/compare/v0.0.5...v0.0.6)

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": {
@@ -7034,11 +7034,6 @@
             "safe-buffer": "5.0.1"
           }
         },
-        "stringstream": {
-          "version": "0.0.5",
-          "bundled": true,
-          "optional": true
-        },
         "strip-ansi": {
           "version": "3.0.1",
           "bundled": true,
@@ -17582,11 +17577,6 @@
         "is-hexadecimal": "1.0.2"
       }
     },
-    "stringstream": {
-      "version": "0.0.5",
-      "resolved": "https://registry.npmjs.org/stringstream/-/stringstream-0.0.5.tgz",
-      "integrity": "sha1-TkhM1N5aC7vuGORjB3EKioFiGHg="
-    },
     "strip-ansi": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",

yarn.lock

@@ -8896,8 +8896,8 @@ stringify-entities@^1.0.1:
     is-hexadecimal "^1.0.0"
 
 stringstream@~0.0.4:
-  version "0.0.5"
+  version "0.0.6"
-  resolved "https://registry.yarnpkg.com/stringstream/-/stringstream-0.0.5.tgz#4e484cd4de5a0bbbee18e46307710a8a81621878"
+  resolved "https://registry.yarnpkg.com/stringstream/-/stringstream-0.0.6.tgz#7880225b0d4ad10e30927d167a1d6f2fd3b33a72"
 
 strip-ansi@^3.0.0, strip-ansi@^3.0.1:
   version "3.0.1"