Bump to version 2.15.0
Bump up to new elasticsearch indexer version (will open an MR on the GitLab side once this is merged).
Changes included:
- remove support for go 1.15
- upgrade go version to 1.16
- replace deprecated package io/ioutil
Bump up to new elasticsearch indexer version (will open an MR on the GitLab side once this is merged).
Changes included: