Features and Bugfixes

• generate runtime conditional code when modules are forcefully merged from multiple runtimes
  • This fixes a Cannot read property 'call' of undefined error in webpack runtime, because modules are used that are not in the graph in one runtime
• disabled source code analysis for side effects in non-production modes
  • this causes unnecessary changes to parent modules in development
  • add optimization.sideEffects: "flag" as option for this