v2.0.3

Updates the Version constant to the correct version.

v1.0.1

This release makes v1 code type aliases of v2 code.

Reasoning for type aliases:

Users are directly exposed to exported types in this package such as
CallOption. google-cloud-go will rely on v2 of gax, but a user's codebase is
still going to have the non-v2/ gax import paths.

v2.0.2

Backoff minimum value: Backoff minimally sends 1ns instead of 0, which causes things like time.NewTicker to error.

v2.0.1

Modules for v2: Create v2/ subdirectory as well as a go.mod for v2/.

v2.0.0

This is the initial release. v1.0.0 was tagged by mistake.