Various fixes

Remove file-based env vars
Add support for session credentials
Add account ID as an output
Remove testing actions workflow

package.json

@@ -1,7 +1,7 @@
 {
   "name": "configure-aws-credentials-for-github-actions",
   "version": "0.0.0",
-  "description": "Setup AWS",
+  "description": "Configure AWS Credentials",
   "main": "index.js",
   "scripts": {
     "lint": "eslint **.js",
@@ -18,7 +18,7 @@
     "Actions",
     "JavaScript"
   ],
-  "author": "GitHub",
+  "author": "AWS",
   "license": "MIT",
   "bugs": {
     "url": "https://github.com/aws/configure-aws-credentials-for-github-actions/issues"
@@ -26,12 +26,11 @@
   "homepage": "https://github.com/aws/configure-aws-credentials-for-github-actions#readme",
   "dependencies": {
     "@actions/core": "^1.2.0",
-    "@actions/exec": "^1.0.1",
-    "@actions/io": "^1.0.1"
+    "aws-sdk": "^2.562.0"
   },
   "devDependencies": {
     "@zeit/ncc": "^0.20.5",
-    "eslint": "^6.5.1",
+    "eslint": "^6.6.0",
     "jest": "^24.9.0"
   }
 }