include all engines in package.json

0.10 and 0.11 are being tested in travis, but I am still getting a warning with npm install.
Fixes #121

config should be @config
Merge pull request #122 from evanlucas/bugfix-121

Fixes #121 - config is not defined
Merge pull request #116 from calebTomlinson/patch-1

include all engines in package.json
Update nodeunit to fix tests on node 0.11
VarChar, NVarChar length must not be zero
Zero value was casted as null when using BigInt as input parameter
Binary, VarBinary and Image are now supported as input parameters
#104 - Dates before 1900/01/01 of DateTime input parameters resulted in "Out of bounds" error
Ignores tweaked
Change default isolationLevel to READ_COMMITED