3.0.0-beta.3 - 2018.06.07

See all changes in #325

• Added Promise.allSettled proposal, #399
• Set.prototype.intersect renamed to Set.prototype.intersection per tc39/proposal-set-methods@1c62b3d, tc39/proposal-set-methods@703b081
• Pattern matching proposal moved to stage 1, removed Symbol.patternValue - now it's missed in the proposal repo
• Added /proposals/ entry points for allow include all features from one proposal (for example, core-js/proposals/reflect-metadata)
• Allowed more granular inclusion of features from /es/ path like in /features/ (for example, core-js/es/array/from)
• Fixed webpack dependency in core-js-builder