Bumped to next dev version (0.5.2)
Bumped to next dev version (0.5.2)

weierophinney/zf-docs-toolchain-experiment,zf2timo/zend-expressive,acelaya/zend-expressive,moderndeveloperllc/zend-expressive,nightlinus/zend-expressive,ezimuel/zend-expressive