chore: Bump aws-sdk from 2.983.0 to 2.988.0 (#258)

Bumps [aws-sdk](https://github.com/aws/aws-sdk-js) from 2.983.0 to 2.988.0.
- [Release notes](https://github.com/aws/aws-sdk-js/releases)
- [Changelog](https://github.com/aws/aws-sdk-js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-js/compare/v2.983.0...v2.988.0)

---
updated-dependencies:
- dependency-name: aws-sdk
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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package-lock.json

@@ -925,9 +925,9 @@
       "dev": true
     },
     "aws-sdk": {
-      "version": "2.983.0",
-      "resolved": "https://registry.npmjs.org/aws-sdk/-/aws-sdk-2.983.0.tgz",
-      "integrity": "sha512-i4QMJt5hEYzhoDzmbo0v+aAuHQPXM6ah15GBKObbxwYxmzK9wjMG+FH3DiWZZHdFsf3C+p1zDg4rIr63jmOeBw==",
+      "version": "2.988.0",
+      "resolved": "https://registry.npmjs.org/aws-sdk/-/aws-sdk-2.988.0.tgz",
+      "integrity": "sha512-2b56fPJ9vHgLnDeZ6NDgQzzJT/0NbSGNYIzGZx47/FROwoxRArqt9agiQ14y1zlXPsP9QNKPjp6HsW4IFLjGWQ==",
       "requires": {
         "buffer": "4.9.2",
         "events": "1.1.1",

package.json

@@ -26,7 +26,7 @@
   "homepage": "https://github.com/aws-actions/configure-aws-credentials#readme",
   "dependencies": {
     "@actions/core": "^1.5.0",
-    "aws-sdk": "^2.983.0"
+    "aws-sdk": "^2.988.0"
   },
   "devDependencies": {
     "@zeit/ncc": "^0.22.3",