Update Version v4.7.2

Add Release Date for v4.7.1 Release

Bump version 4.7.1

Modify search path for aggregation script

This release still uses dep and requires a different path to
search over.

Modify search path for aggregation script

This release still uses dep and requires a different path to
search over.

Add release date for 4.6.3 release

Bump v4.6.3-rc.1

Update a few component version numbers

This better reflects which version of the components we are
using.

Fix panic when parsing backup options with extra space

There existed a condition where checking for new backup options
in the "pgo backup" command could cause a panic. This resolves the
issue both by adding a guard on the array and trimming whitespace.

Bump version v4.7.0-beta.3