Breaking: Drop support for node <8

Author: phated

.ci/.azure-pipelines-steps.yml

@@ -1,8 +1,4 @@
 steps:
-- script: npm i -g npm@$(npm_version)
-  displayName: Use legacy npm version $(npm_version)
-  condition: ne(variables['npm_version'], '')
-
 - task: NodeTool@0
   inputs:
     versionSpec: '$(node_version)'

.ci/.azure-pipelines.yml

@@ -15,14 +15,6 @@ jobs:
           node_version: 10
         Node_v8:
           node_version: 8
-        Node_v6:
-          node_version: 6
-        Node_v4:
-          node_version: 4
-        Node_v0_12:
-          node_version: 0.12
-        Node_v0_10:
-          node_version: 0.10
     steps:
       - template: .azure-pipelines-steps.yml
 
@@ -38,17 +30,6 @@ jobs:
           node_version: 10
         Node_v8:
           node_version: 8
-        Node_v6:
-          node_version: 6
-        Node_v4:
-          node_version: 4
-          npm_version: 2
-        Node_v0_12:
-          node_version: 0.12
-          npm_version: 2
-        Node_v0_10:
-          node_version: 0.10
-          npm_version: 2
     steps:
       - template: .azure-pipelines-steps.yml
 
@@ -64,14 +45,6 @@ jobs:
           node_version: 10
         Node_v8:
           node_version: 8
-        Node_v6:
-          node_version: 6
-        Node_v4:
-          node_version: 4
-        Node_v0_12:
-          node_version: 0.12
-        Node_v0_10:
-          node_version: 0.10
     steps:
       - template: .azure-pipelines-steps.yml
 

.travis.yml

@@ -7,10 +7,5 @@ node_js:
   - '12'
   - '10'
   - '8'
-  - '6'
-  - '5'
-  - '4'
-  - '0.12'
-  - '0.10'
 after_script:
   - npm run coveralls

appveyor.yml

@@ -4,10 +4,6 @@
 environment:
   matrix:
     # node.js
-    - nodejs_version: "0.10"
-    - nodejs_version: "0.12"
-    - nodejs_version: "4"
-    - nodejs_version: "6"
     - nodejs_version: "8"
     - nodejs_version: "10"
     - nodejs_version: "12"

package.json

@@ -12,7 +12,7 @@
   "repository": "gulpjs/findup-sync",
   "license": "MIT",
   "engines": {
-    "node": ">= 0.10"
+    "node": ">= 8"
   },
   "main": "index.js",
   "files": [