v7.0.0

Changelog

• a0e19d3 Merge pull request #344 from snyk/feat/split-collation
• e0120cf chore: remove returned versions from collator.Collate
• 8b7e951 fix: always fetch specs from cold storage
• 54e8ba1 feat: split scraper and api in vervet underground
• 5a73833 feat: use read only storage interface in api handler
• d44c671 fix: allow overwriting scrape time in disk storage
• 7382207 feat: remove memory storage from vervet underground
• 9715877 feat: add disk based storage interface