Bump to version 5.7.0

Bump version to 5.6.0

Bump version to 5.5.0

Bump version to 5.4.0

Merge pull request #299 from CESNET/v5.3.0

Bump version to 5.3.0

Merge pull request #293 from CESNET/v5.2.0

Bump version to 5.2.0

Merge pull request #288 from CESNET/v5.1.0

Bump version to 5.1.0

Merge pull request #283 from CESNET/parser-vlan-stats

Telemetry: add per-VLAN parser statistics and size histogram support

Merge pull request #257 from CESNET/new-version-4.16.0

ipfixprobe: increased version, updated ChangeLog, released RPM package