Update Create/UpdateDNSRecord method signatures

[joaoafonsopereira]

Disclaimer: this is my first ever contribution to an open-source project, so any suggestions that help me improve my PR game are very welcome.

Description

Changes CreateDNSRecord and UpdateDNSRecord method signatures such that they both return (DNSRecord, error).
Closes #1239

Types of changes

What sort of change does your code introduce/modify?

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.
• This change is using publicly documented (api.cloudflare.com or developers.cloudflare.com) and stable APIs.

[github-actions]

changelog detected ✅

[codecov-commenter]

Codecov Report

Merging #1243 (c283e37) into master (9ac4a16) will decrease coverage by 0.08%.
The diff coverage is 45.16%.

@@            Coverage Diff             @@
##           master    #1243      +/-   ##
==========================================
- Coverage   49.31%   49.23%   -0.08%     
==========================================
  Files         130      131       +1     
  Lines       12557    12665     +108     
==========================================
+ Hits         6192     6236      +44     
- Misses       4940     4988      +48     
- Partials     1425     1441      +16     

Impacted Files	Coverage Δ
access_identity_provider.go	70.00% <ø> (ø)
addressing_ip_prefix.go	45.45% <ø> (ø)
convert_types.go	2.01% <ø> (ø)
addressing_address_map.go	39.04% <39.04%> (ø)
dns.go	73.21% <69.23%> (ø)
resource.go	83.33% <100.00%> (+4.38%)	⬆️
tunnel.go	41.39% <100.00%> (-0.55%)	⬇️

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[jacobbednarz]

this is my first ever contribution to an open-source project, so any suggestions that help me improve my PR game are very welcome.

congrats! this is a super solid first PR 🏆

• you opened an issue to discuss the proposed changes ✅
• you read the contribution guidelines ✅
• you filled out the PR template with the context of the change and the requirements ✅
• you updated associated tests ✅
• you added a CHANGELOG entry ✅
• you used GitHub closing keywords to link issues ✅

no comments from me other than i wish more contributions were like this since it is on point. thank you!

hopefully this is the first of many PRs to come!

[github-actions]

This functionality has been released in v0.64.0.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!