v0.4.0

Changelog

• c491077 Add Czech localization
• 01f4261 Bump github.com/prometheus/client_golang from 1.14.0 to 1.15.0
• fa54801 Bump golang.org/x/net from 0.8.0 to 0.9.0
• 8a5106c Bump go.uber.org/multierr from 1.10.0 to 1.11.0
• 8164210 Move from gopkg.in/alecthomas/kingpin.v2 to github.com/alecthomas/kingpin/v2
• d1b2a0e Bump go.uber.org/multierr from 1.9.0 to 1.10.0
• 57a0990 Bump github.com/prometheus/common from 0.41.0 to 0.42.0
• 9230d24 Bump golang.org/x/net from 0.7.0 to 0.8.0
• 30a955e Bump github.com/prometheus/common from 0.40.0 to 0.41.0
• 839c892 Bump github.com/prometheus/common from 0.39.0 to 0.40.0
• 4e281aa Bump golang.org/x/net from 0.6.0 to 0.7.0
• e5e78ed Bump golang.org/x/net from 0.5.0 to 0.6.0
• d5b3afa Bump golang.org/x/net from 0.4.0 to 0.5.0
• 615dd27 Update dependencies
• 551563e Switch to Prometheus' collectors package
• f4b1d3a Switch to github.com/go-kit/log
• 4ed70cb Use simple channel receive instead of select
• 3a99137 Replace custom ErrClosed with net.ErrClosed
• 94105d0 Switch to reusable workflow for running tests