build(deps): Bump pub packages

[cpswan]

Supersedes #1491

The Dependabot pub updater keeps failing to raise PRs dependabot/dependabot-core#7223

- What I did

Updated pubspec.yaml for at_secondary_server per the changes that should have been generated by Dependabot

EXCEPT I have NOT bumped at_commons ( from 3.0.52 to 3.0.53 ) as that's causing unit tests to fail

- How I did it

Took this from the end of the latest (failed) Dependabot run

updater | +------------------------------------------------+
updater | |      Changes to Dependabot Pull Requests       |
updater | +---------+--------------------------------------+
updater | | created | basic_utils ( from 5.6.0 to 5.6.1 )  |
updater | | created | at_commons ( from 3.0.52 to 3.0.53 ) |
updater | | created | collection ( from 1.17.2 to 1.18.0 ) |
updater | | created | crypton ( from 2.1.0 to 2.2.0 )      |
updater | | created | at_utils ( from 3.0.14 to 3.0.15 )   |
updater | | created | at_lookup ( from 3.0.37 to 3.0.38 )  |
updater | +---------+--------------------------------------+

and applied to pubspec.yaml

- How to verify it

Automated tests

- Description for the changelog

build(deps): Bump pub packages