Bump gm from 1.23.0 to 1.23.1 (#1821)

Bumps [gm](https://github.com/aheckmann/gm) from 1.23.0 to 1.23.1.
- [Release notes](https://github.com/aheckmann/gm/releases)
- [Changelog](https://github.com/aheckmann/gm/blob/master/History.md)
- [Commits](https://github.com/aheckmann/gm/compare/1.23.0...1.23.1)

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

package-lock.json

@@ -6378,14 +6378,29 @@
       }
     },
     "gm": {
-      "version": "1.23.0",
-      "resolved": "https://registry.npmjs.org/gm/-/gm-1.23.0.tgz",
-      "integrity": "sha1-gKL+nL8TFRUCSEZERlhGEmn1JmE=",
+      "version": "1.23.1",
+      "resolved": "https://registry.npmjs.org/gm/-/gm-1.23.1.tgz",
+      "integrity": "sha1-Lt7rlYCE0PjqeYjl2ZWxx9/BR3c=",
       "requires": {
         "array-parallel": "~0.1.3",
         "array-series": "~0.1.5",
         "cross-spawn": "^4.0.0",
-        "debug": "~2.2.0"
+        "debug": "^3.1.0"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
+          "integrity": "sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==",
+          "requires": {
+            "ms": "2.0.0"
+          }
+        },
+        "ms": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
+          "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g="
+        }
       }
     },
     "got": {