Produce LSIF data for each commit for fast/precise code nav
requested to merge sourcegraph/produce-lsif-data-for-each-commit-for-fast-precise-code-nav-1576987955 into master
Created by: sqs
Adds steps to the build pipeline (using GitHub Actions) to generate and upload LSIF for fast and precise code navigation on Sourcegraph. Uses the recommended lsif.yml file in Sourcegraph documentation.