Update default runtime to node16 (#134)

Node 12 has an end of life on April 30, 2022.

This PR updates the default runtime to [node16](https://github.blog/changelog/2021-12-10-github-actions-github-hosted-runners-now-run-node-js-16-by-default/), rather then node12. 

This is supported on all Actions Runners v2.285.0 or later.

action.yml

@@ -9,5 +9,5 @@ inputs:
     description: 'Destination path'
     required: false
 runs:
-  using: 'node12'
-  main: 'dist/index.js'
+  using: 'node16'
+  main: 'dist/index.js'

package-lock.json

@@ -16,23 +16,9 @@
       }
     },
     "@actions/core": {
-      "version": "1.10.0",
-      "resolved": "https://registry.npmjs.org/@actions/core/-/core-1.10.0.tgz",
-      "integrity": "sha512-2aZDDa3zrrZbP5ZYg159sNoLRb61nQ7awl5pSvIq5Qpj81vwDzdMRKzkWJGJuwVvWpvZKx7vspJALyvaaIQyug==",
-      "requires": {
-        "@actions/http-client": "^2.0.1",
-        "uuid": "^8.3.2"
-      },
-      "dependencies": {
-        "@actions/http-client": {
-          "version": "2.1.0",
-          "resolved": "https://registry.npmjs.org/@actions/http-client/-/http-client-2.1.0.tgz",
-          "integrity": "sha512-BonhODnXr3amchh4qkmjPMUO8mFi/zLaaCeCAJZqch8iQqyDnVIkySjB38VHAC8IJ+bnlgfOqlhpyCUZHlQsqw==",
-          "requires": {
-            "tunnel": "^0.0.6"
-          }
-        }
-      }
+      "version": "1.2.6",
+      "resolved": "https://registry.npmjs.org/@actions/core/-/core-1.2.6.tgz",
+      "integrity": "sha512-ZQYitnqiyBc3D+k7LsgSBmMDVkOVidaagDG7j3fOym77jNunWRuYx7VSHa9GNfFZh+zh61xsCjRj4JxMZlDqTA=="
     },
     "@actions/http-client": {
       "version": "1.0.11",
@@ -2228,11 +2214,6 @@
         "punycode": "^2.1.0"
       }
     },
-    "uuid": {
-      "version": "8.3.2",
-      "resolved": "https://registry.npmjs.org/uuid/-/uuid-8.3.2.tgz",
-      "integrity": "sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg=="
-    },
     "v8-compile-cache": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/v8-compile-cache/-/v8-compile-cache-2.1.1.tgz",

package.json

@@ -29,7 +29,7 @@
   "homepage": "https://github.com/actions/download-artifact#readme",
   "dependencies": {
     "@actions/artifact": "^0.6.0",
-    "@actions/core": "^1.10.0"
+    "@actions/core": "^1.2.6"
   },
   "devDependencies": {
     "@types/node": "^12.12.6",