feature: adding api and web to meta api endpoint.

[Jamian]

The Api and Web lists are returned from the meta API but still aren't supported in the Go library. This change exposes them in the same way as the other blocks which are returned. I'm working on a change in the GitHub Terraform provider to also support exposing these API/Web CIDRs so if this is all ok I can continue on with that change as well.

[google-cla]

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[gmlewis]

Thank you, @Jamian !
Just a couple minor tweaks, please, in addition to the CLA.

[codecov]

Codecov Report

Merging #2435 (05d67f4) into master (acca0b6) will not change coverage.
The diff coverage is n/a.

@@ Coverage Diff @@## master #2435 +/- ##
=======================================
Coverage 98.08% 98.08% =======================================
Files 122 122 Lines 10632 10632 =======================================
Hits 10428 10428 Misses 140 140 Partials 64 64 

Impacted Files	Coverage Δ
github/misc.go	100.00% <ø> (ø)

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[Jamian]

@gmlewis Hey, thanks for the feedback. I have made the changes and sorted the CLA out. 👍

[gmlewis]

Thanks, @Jamian ! I think the tests might need updating, please.

[Jamian]

Hey @gmlewis, of course - awkwardly embarrassing! Just pushed the fixes to get tests passing 🤞

[gmlewis]

Thank you, @Jamian !
LGTM.
Merging.