Update module russross/blackfriday/v2 to v2.1.0

See merge request !16

Update module openzipkin/zipkin-go to v0.2.5

See merge request !14

Update module theckman/go-flock to v0.8.0

See merge request !17

Update module google/go-cmp to v0.5.4

See merge request !12

Update module prometheus/client_golang to v1.9.0

See merge request !15

Update module gorilla/handlers to v1.5.1

See merge request !13

Update module contrib.go.opencensus.io/exporter/zipkin to v0.1.2

See merge request !10

Update module go.opencensus.io to v0.22.5

See merge request !11

This reverts commit f8bba073.

That version is incompatible with go 1.11 (debian).

Update golang.org/x/crypto commit hash to eec23a3

See merge request !6

Update golang.org/x/sync commit hash to 09787c9

See merge request !7

Update github.com/emersion/go-textwrapper commit hash to 65d8968

See merge request !4

Update github.com/lunixbochs/struc commit hash to 784aaeb

See merge request !5

Configure Renovate

See merge request !3

Refactor the pwhash package to split the various encoders into their
own files for readability.

Useful for large blob responses.

Run tests via Gitlab CI

See merge request !2