bump cloudflare-go to v0.20.0

[jacobbednarz]

Changelog

Improvements

• Provide TXT DNS record values for verifification in CustomHostnameSSL (Add txt_name & txt_value fields (DNS validation) to CustomHostname struct cloudflare-go#669)
• Add json_response_enabled to WaitingRoom struct (Add new field json_response_enabled in waiting room cloudflare-go#672)
• Respect context timeouts for all requests (Respect context cancellation and deadlines. cloudflare-go#671)
• Only make HTTP GET calls for DNS records in updates when the name or value isn't provided by the user (Don't fetch unneeded DNS records in UpdateDNSRecord. cloudflare-go#673)
• Add support for RequireAll, Enabled, Version,and Domain in Access device posture rules (WDAPI-459 add device posture rule input cloudflare-go#676, Update import example command to reflect reality #677)
• Add support for fetching origin CA certificates (Add functionality related to Origin CA root certificates cloudflare-go#680)
• Handle non-positive values for per_page and page query parameters in WithPagination (WithPagination should ignore non-positive numbers. cloudflare-go#682)
• Improve concurrency + deadlock prevention for ListZones and ListZonesContext (fix: multiple bugs in ListZones and ListZonesContext cloudflare-go#674)
• Add ability to change universal SSL domain verification type (Add ability to change certificate validation method cloudflare-go#679)
• master is now compatible with linters (lint: fix all violations on master cloudflare-go#685)
• Add improved support for Rulesets (rulesets: make downstream life easier for Terraform cloudflare-go#684)

Fixes

• CertificatePack.PrimaryCertificate and CertificatePack.ID are now strings for all certificates (certificate_pack: update id and primary_certificate types cloudflare-go#678)
• Fix JSON mapping for NotificationMechanismData (Fix json field name for notification mechanisms data cloudflare-go#681)

Full changelog: https://github.com/cloudflare/cloudflare-go/releases/tag/v0.20.0