update circleci base node image to v14 and upgrade aws sdk to latest version

Author: emmkong

circle.yml

@@ -3,7 +3,7 @@ version: 2
 defaults: &defaults
  working_directory: ~/repo
  docker:
- - image: circleci/node:8
+ - image: circleci/node:14
 
 jobs:
  test:

package-lock.json

@@ -25,7 +25,7 @@
  "url": "https://github.com/orchestrated-io/serverless-plugin-offline-dynamodb-stream/issues"
  },
  "dependencies": {
- "aws-sdk": "2.815.0",
+ "aws-sdk": "2.816.0",
  "debug": "^4.3.1",
  "lodash": "^4.17.20",
  "path": "0.12.7",