Bump pytest to 3.6.3 and mercurial to 4.6.2
Bump pytest to 3.6.3 and mercurial to 4.6.2

MozillaSecurity/funfuzz,nth10sd/funfuzz,nth10sd/funfuzz,MozillaSecurity/funfuzz,MozillaSecurity/funfuzz,nth10sd/funfuzz