v1.0.0-prerelease.18

Changelog

• daf5ca0 pfe-cta bug fixes + open brand styles (#353)
• efd115b remove sourceMappingURL from src/pfelement.js (#464)
• 7d5e78f adding a version getter to each component (#453)
• 88fb56a fixing the super call in the constructor of pfe-health-index (#454)
• 4f9c799 fix pfe-avatar in ie11