.travis.yml: surround node versions in quotes

since it treats `0.10` as a float

Signed-off-by: Fedor Indutny <fedor@indutny.com>
typo: was -> were

Signed-off-by: Fedor Indutny <fedor@indutny.com>
client: fix RangeError: Maximum call stack size exceeded

closes #147

Signed-off-by: Fedor Indutny <fedor@indutny.com>
1.25.3