Stable versions of go-algorand-sdk (v2.11.0) and indexer (v3.9.0). (#188

)

Set Indexer version v3.9.0-rc1. (#187)

Bump to indexer v3.7.1. (#181)

Bump to indexer v3.7.0, go-algorand-sdk v2.7.0. (#180)

Tweak release template. (#176)

Bump indexer dependency to v3.4.0 (#161)

Bump to indexer v3.4.1-rc1 and go-algorand-sdk 2.4.0 (#160)

Add gpg signature to checksum file. (#150)