v2

• The order of working with the module has been changed: now we first create an
  object using the module (function new), and then the object creates a
  certificate (method getCert).
• Added generate CSR inside the module. External CSR-file is no longer required.
• Added method for getting certificate expiration date

v1

The first version has been implemented. Version restrictions:

• Prepared CSR-file required
• Requires program openssl
• Requires writing temporary files to a pre-specified folder

Read more here or here.