feat: drop Node.js 8 support

Author: zkochan

.travis.yml

@@ -1,9 +1,9 @@
 language: node_js
 sudo: false
 node_js:
+  - "14"
   - "12"
   - "10"
-  - "8"
 before_install:
   - curl -L https://unpkg.com/@pnpm/self-installer | node
 install:

appveyor.yml

@@ -1,8 +1,8 @@
 environment:
   matrix:
+    - nodejs_version: "14"
     - nodejs_version: "12"
     - nodejs_version: "10"
-    - nodejs_version: "8"
 
 platform:
   - x64

package.json

@@ -25,7 +25,7 @@
   "author": "Mike Sherov",
   "license": "Artistic-2.0",
   "engines": {
-    "node": ">=8.15"
+    "node": ">=10.13"
   },
   "bugs": {
     "url": "https://github.com/npm/lifecycle/issues"