chore(ci): update test environment to node 10

Node 6.x has been EOL since April 2019, and Node 8.x becaome EOL in Dec
2019.
This pushes the CI environment to use an Active LTS version of Node.

Refs: https://github.com/nodejs/Release

Signed-off-by: Mike Fiedler <[email protected]>

Author: miketheman

circle.yml

@@ -33,7 +33,7 @@ jobs:
           python get-poetry.py --preview --yes
           rm get-poetry.py
       # install nodejs
-      - run: curl -sL https://deb.nodesource.com/setup_6.x | sudo bash - && sudo apt -y install nodejs
+      - run: curl -sL https://deb.nodesource.com/setup_10.x | sudo bash - && sudo apt -y install nodejs
       # install serverless & depcheck
       - run: npm install -g serverless depcheck
       # install deps

package.json

@@ -2,7 +2,7 @@
   "name": "serverless-python-requirements",
   "version": "5.0.1",
   "engines": {
-    "node": ">=6.0"
+    "node": ">=10.0"
   },
   "description": "Serverless Python Requirements Plugin",
   "author": "United Income <[email protected]>",