Merge pull request #118 from messagebird/go-118-alpine-315

upgrade Docker container to use golang:1.18 and alpine:3.15. Pin alpine

Merge pull request #118 from messagebird/go-118-alpine-315

upgrade Docker container to use golang:1.18 and alpine:3.15. Pin alpine

Merge pull request #108 from dsmoljanovic/infobip-multiple-recipients

Support multiple SMS recipients for Infobip provider

Merge branch 'master' of github.com:messagebird/sachet

use go 1.16 to build

even simpler url building for kavenegar

Merge pull request #79 from messagebird/update-deps

Update deps

Merge pull request #66 from catawiki/ivdm-support-voice-messages

Add support for voice messages to messagebird provider

small typo

Merge pull request #51 from r3nic1e/templating

Add message template support