Guyana's environmental regulator on Tuesday appealed a court decision that last week declared that the agency and Exxon Mobil unit breached oil-spill insurance obligations for the company's first offshore project in the country.Guyana's High Court Justice Sandil Kissoon said in his ruling that Exxon 'engaged in a disingenuous attempt' to dilute its obligations under its environmental permit for Liza One project by not fully meeting oil-spill insurance requirements…