Fix detection of Travis instance
Fix detection of Travis instance

platformio/platformio,ZachMassia/platformio,eiginn/platformio,bkudria/platformio,mcanthony/platformio,bkudria/platformio,dkuku/platformio,TimJay/platformio,atyenoria/platformio,platformio/platformio-core,bkudria/platformio,platformio/platformio-core,TimJay/platformio,jrobeson/platformio,jrobeson/platformio,TimJay/platformio,TimJay/platformio,jrobeson/platformio,valeros/platformio,jrobeson/platformio,awong1900/platformio,TimJay/platformio,bkudria/platformio,awong1900/platformio,mseroczynski/platformio,mplewis/platformio,awong1900/platformio