update!: drop support for node < 10.x

Author: broofa

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [8.x, 10.x, 12.x, 14.x]
+        node-version: [10.x, 12.x, 14.x, 16.x]
 
     steps:
     - uses: actions/checkout@v2

package.json

@@ -5,7 +5,7 @@
     "email": "robert@broofa.com"
   },
   "engines": {
-    "node": ">=4.0.0"
+    "node": ">=10.0.0"
   },
   "bin": {
     "mime": "cli.js"