Update version and changelog for 4.3.0

Update version and changelog for 4.2.2 (labstack#1838)

Update version to v4.2.0

Bumped version

Signed-off-by: Vishal Rana <[email protected]>

Bumped version

Signed-off-by: Vishal Rana <[email protected]>

Updated version

Signed-off-by: Vishal Rana <[email protected]>

round-trip paramValues without exploding (labstack#1463)

Fix param value bug (labstack#1467)

* set parameter value in the pvalues slice

* update echo version

* update travis yml to fix failing build and add go modules support

* Add tests

* Update router_test.go

Co-authored-by: Vishal Rana <[email protected]>

Updated deps

Signed-off-by: Vishal Rana <[email protected]>