Bump minimist and mkdirp in /functions

Bumps [minimist](https://github.com/minimistjs/minimist) and [mkdirp](https://github.com/isaacs/node-mkdirp). These dependencies needed to be updated together.

Updates `minimist` from 1.2.0 to 1.2.8
- [Release notes](https://github.com/minimistjs/minimist/releases)
- [Changelog](https://github.com/minimistjs/minimist/blob/main/CHANGELOG.md)
- [Commits](https://github.com/minimistjs/minimist/compare/v1.2.0...v1.2.8)

Updates `mkdirp` from 0.5.1 to 0.5.6
- [Release notes](https://github.com/isaacs/node-mkdirp/releases)
- [Changelog](https://github.com/isaacs/node-mkdirp/blob/main/CHANGELOG.md)
- [Commits](https://github.com/isaacs/node-mkdirp/compare/0.5.1...v0.5.6)

---
updated-dependencies:
- dependency-name: minimist
  dependency-type: indirect
- dependency-name: mkdirp
  dependency-type: indirect
...

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

functions/package-lock.json

@@ -673,6 +673,14 @@
         "readable-stream": "~1.0.32"
       }
     },
+    "busboy": {
+      "version": "0.3.1",
+      "resolved": "https://registry.npmjs.org/busboy/-/busboy-0.3.1.tgz",
+      "integrity": "sha512-y7tTxhGKXcyBxRKAni+awqx8uqaJKrSFSNFSeRG5CsWNdmy2BIK+6VGWEW7TZnIO/533mtMEA4rOevQV815YJw==",
+      "requires": {
+        "dicer": "0.3.0"
+      }
+    },
     "bytebuffer": {
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/bytebuffer/-/bytebuffer-5.0.1.tgz",
@@ -1910,10 +1918,6 @@
             "brace-expansion": "^1.1.7"
           }
         },
-        "minimist": {
-          "version": "1.2.0",
-          "bundled": true
-        },
         "minipass": {
           "version": "2.3.5",
           "bundled": true,
@@ -1929,19 +1933,6 @@
             "minipass": "^2.2.1"
           }
         },
-        "mkdirp": {
-          "version": "0.5.1",
-          "bundled": true,
-          "requires": {
-            "minimist": "0.0.8"
-          },
-          "dependencies": {
-            "minimist": {
-              "version": "0.0.8",
-              "bundled": true
-            }
-          }
-        },
         "ms": {
           "version": "2.1.2",
           "bundled": true
@@ -2735,18 +2726,16 @@
       }
     },
     "minimist": {
-      "version": "0.0.8",
-      "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
-      "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0=",
-      "dev": true
+      "version": "1.2.8",
+      "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.8.tgz",
+      "integrity": "sha512-2yyAR8qBkN3YuheJanUpWC5U3bb5osDywNB8RzDVlDwDHbocAJveqqj1u8+SVD7jkWT4yvsHCpWqqWqAxb0zCA=="
     },
     "mkdirp": {
-      "version": "0.5.1",
-      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
-      "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
-      "dev": true,
+      "version": "0.5.6",
+      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.6.tgz",
+      "integrity": "sha512-FP+p8RB8OWpF3YZBCrP5gtADmtXApB5AMLn+vdyA+PyxCjrCs00mjyUozssO33cwDeT3wNGdLxJ5M//YqtHAJw==",
       "requires": {
-        "minimist": "0.0.8"
+        "minimist": "^1.2.6"
       }
     },
     "ms": {