0.19.0

• Added support for "esm":"cjs" option
• Added support for unquoted ESM_OPTIONS values
• Aligned ERR_UNKNOWN_FILE_EXTENSION error with Node
• Aligned Module.wrapper values more closely with Node
• Aligned require.resolve() and require.resolve.paths() with Node 8.9.0+
• Enabled sharing state across loader instances
• Ensured dynamic import works in nested CJS modules (#184)
• Ensured ESM_OPTIONS are used when for opt-ins with no options (#188)
• Ensured exported bindings are validated before code execution
• Ensured legacy error code is used for missing CJS modules (#206)
• Ensured module.parent is undefined for ESM parents
• Ensured static import specifiers are resolved before code execution
• Ensured third-party files are cached only if they have compilation changes
• Fixed a usage scenario with @babel/register and nyc (#179)
• Fixed "await" option support (#199)
• Fixed hang when parsing source mapping URLs (#207)
• Fixed hang with jest@^22.0.0
• Fixed parsing circular dependencies with anonymous function declarations (#183)