3.0.0

This release improves the architecture for scanning of source and dependency files,
leading to a 100x speed improvement when dealing with larger codebases, such as
doctrine/orm or doctrine/dbal.

A new backwards incompatibility check was also introduced (and enabled by default),
inspecting whether an ancestor of a symbol was introduced or removed.

Total issues resolved: 8

• 97: Allow specifying different source locations across separate versions of a library thanks to @Majkl578
• 106: Are removal of parent classes/interfaces to be considered BC breaks? thanks to @Nyholm
• 108: Moved all BC compliance and Changes instance to internally use generators for better "on the fly" results thanks to @Ocramius
• 109: Added BC checkers to verify that no ancestors of a class or interface were removed thanks to @Ocramius
• 110: Looking for classes in a DirectoriesSourceLocator is extremely slow, since all AST symbols are traversed to look for existing classes thanks to @Ocramius
• 119: Running out of memory thanks to @nschoellhorn
• 120: Usage of roave/better-reflection composer source-locators for major performance improvements thanks to @Ocramius
• 121: Update to doctrine/cs v5 thanks to @carusogabriel