Upgrade execa (#2303)

* Upgrade execa

* use our own types

* use our own types

* api

* api

* chs

Author: sobolk

.changeset/stale-pillows-run.md

@@ -0,0 +1,10 @@
+---
+'@aws-amplify/backend-deployer': patch
+'@aws-amplify/backend-function': patch
+'create-amplify': patch
+'@aws-amplify/plugin-types': minor
+'@aws-amplify/cli-core': patch
+'@aws-amplify/backend-cli': patch
+---
+
+Upgrade execa