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

ipfixprobe: increased version, updated ChangeLog, released RPM package 

Merge pull request #191 from CESNET/new-version ipfixprobe: increased version (4.11), updated ChangeLog, released RPM…