Bump github.com/stretchr/testify from 1.6.1 to 1.7.0 (#154)

Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.6.1 to 1.7.0.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](stretchr/testify@v1.6.1...v1.7.0)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

go.mod

@@ -17,7 +17,7 @@ require (
 	github.com/pkg/sftp v1.12.0
 	github.com/robfig/cron/v3 v3.0.1
 	github.com/rs/zerolog v1.20.0
-	github.com/stretchr/testify v1.6.1
+	github.com/stretchr/testify v1.7.0
 	go.etcd.io/bbolt v1.3.5
 	golang.org/x/crypto v0.0.0-20201002170205-7f63de1d35b0
 	gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc // indirect

go.sum

@@ -89,6 +89,8 @@ github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXf
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/vanng822/css v0.0.0-20190504095207-a21e860bcd04 h1:L0rPdfzq43+NV8rfIx2kA4iSSLRj2jN5ijYHoeXRwvQ=
 github.com/vanng822/css v0.0.0-20190504095207-a21e860bcd04/go.mod h1:tcnB1voG49QhCrwq1W0w5hhGasvOg+VQp9i9H1rCM1w=
 github.com/vanng822/go-premailer v0.0.0-20191214114701-be27abe028fe h1:9YnI5plmy+ad6BM+JCLJb2ZV7/TNiE5l7SNKfumYKgc=