Bump nodegit from 0.25.1 to 0.26.2

[adg29]

Updating package.json with entry "nodegit": "^0.26.2" fixes failures described at #37 and #43 wherein

node lifecycleScripts/install throws an error such as

node_modules/git-hours/node_modules/promisify-node/utils/args.js:9
  var args = func.toString().match(/function\s.*?\(([^)]*)\)/)[1];
                                                              ^
TypeError: Cannot read property '1' of null

[raszi]

Thank you very much @adg29 it is working very well for me.

@kimmobrunfeldt is there any chance that you could release a new fixed version?

[BobbyBakes]

When will this be merged?

[kimmobrunfeldt]

@BobbyBakes now