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Version comparison

dependency(version:) and other version constraints now handle versions containing non-numeric characters better, comparing versions using the rpmvercmp algorithm (as using the pkg-config autoconf macro PKG_CHECK_MODULES does).

This is a breaking change for exact comparison constraints which rely on the previous comparison behaviour of extending the compared versions with '0' elements, up to the same length of '.'-separated elements.

For example, a version of '0.11.0' would previously match a version constraint of '==0.11', but no longer does, being instead considered strictly greater.

Instead, use a version constraint which exactly compares with the precise version required, e.g. '==0.11.0'.