chore: bump node versions in ci

.circleci/config.yml

@@ -21,10 +21,14 @@ jobs:
           $NYC yarn test
           $NYC report --reporter text-lcov > coverage.lcov
           curl -s https://codecov.io/bash | bash
-  node-8:
+  node-12:
     <<: *test
     docker:
-      - image: node:8
+      - image: node:12
+  node-10:
+    <<: *test
+    docker:
+      - image: node:10
   # release:
   #   <<: *test
   #   steps:
@@ -48,7 +52,8 @@ workflows:
   "@oclif/plugin-help":
     jobs:
       - node-latest
-      - node-8
+      - node-12
+      - node-10
       # - release:
       #     context: org-global
       #     filters:

appveyor.yml

@@ -18,4 +18,3 @@ after_test:
       bash codecov.sh
 
 build: off
-