The test-env-log crate has been renamed to test-log to better reflect
its intent of not only catering to env_logger specific initialization
but also tracing (and potentially others in the future).
This change updates the documentation to reference test-log instead of
the now deprecated test-env-log.

…1747)

Backports #1747.

Co-authored-by: Eliza Weisman <eliza@buoyant.io>

The line of code that prints the event's fields (including its message)
was accidentally deleted in 0a16972,
while backporting PR #1696 from `master` (where the `Compact` formatter
implementation is significantly different).

This branch puts it back. Also, I've added tests for the `Compact` formatter's
output, to guard against accidentally breaking it in the future. Previously, we
only had tests for the `Full` and `Json` formatters.

Fixes #1741

Signed-off-by: Eliza Weisman <eliza@buoyant.io>

# 0.3.3 (Nov 29, 2021)

This release fixes a pair of regressions in `tracing-subscriber`'s `fmt`
module.

### Fixed

- **fmt**: Fixed missing event fields with `Compact` formatter ([#1755])
- **fmt**: Fixed `PrettyFields` formatter (and thus `format::Pretty`
  event formatter) ignoring the `fmt::Layer`'s ANSI color code
  configuration ([#1747])

[#1755]: #1755
[#1747]: #1747