0.24.0 release

• Internal refactoring: completely new mechanism to rename variable names
• Dynamic import and import.meta support. Fixed #505
• Now usage of some browser-related options with target: 'node' will cause a validation error
• Increased identifierNamesGenerator: 'mangled speed
• CLI: a file path will be displayed on obfuscation error. Fixed #513
• Fixed many transformObjectKeys runtime errors
• Fixed Maximum call stack size exceeded error on large strings when splitString option is enabled
• Fixed #516
• Fixed #512
• Fixed #496
• Internal: switched from awesome-typescript-loader on ts-loader