Update version and changelog for 4.7.1

Fix Echo version number which was not incremented with Release 4.6.2.…

… Now bumped to 4.6.3

fix: route containing escaped colon should be matchable but is not ma…

…tched to request path (fixes labstack#2046)

Update version and changelog for 4.6.1 (labstack#1995)

Update version and changelog for 4.6.0 (labstack#1990)

Update version and changelog for 4.5.0

Update version and changelog for 4.4.0 (labstack#1919)

Update version and changelog for 4.3.0

Update version and changelog for 4.2.2 (labstack#1838)