Golang tooling upgraded to v1.20 and x/net library updated to v0.7.0

• Golang tooling has been upgraded to v1.20.
• x/nethas been upgraded to v0.7.0 to address CVEs:
  • CVE-2022-41723
  • CVE-2022-27664

What's Changed

• [Go] upgraded Golang tooling to 1.20 and x/net to 0.7.0 by @surahman in #60

Full Changelog: release_v1.6.1...release_v1.6.2