update deps

[hyzhak]

we have a lot of obsolete dependencies. Need to update and test new versions

$ npm outdated
Package                Current  Wanted  Latest  Location
actions-on-google        2.1.0   2.2.0   2.2.0  audio-interface-of-internet-archive
ask-sdk                  2.0.3   2.0.7   2.0.7  audio-interface-of-internet-archive
bespoken-tools           1.2.9  1.2.11  1.2.11  audio-interface-of-internet-archive
dashbot                  9.9.0   9.9.2   9.9.2  audio-interface-of-internet-archive
eslint                  4.19.1  4.19.1   5.2.0  audio-interface-of-internet-archive
eslint-plugin-import    2.11.0  2.13.0  2.13.0  audio-interface-of-internet-archive
eslint-plugin-mocha      5.0.0   5.1.0   5.1.0  audio-interface-of-internet-archive
eslint-plugin-node       6.0.1   6.0.1   7.0.1  audio-interface-of-internet-archive
eslint-plugin-promise    3.7.0   3.8.0   3.8.0  audio-interface-of-internet-archive
fetch-mock               6.3.0   6.5.2   6.5.2  audio-interface-of-internet-archive
firebase-admin          5.12.0  5.13.1  5.13.1  audio-interface-of-internet-archive
firebase-functions       1.0.2   1.1.0   2.0.0  audio-interface-of-internet-archive
mathjs                   4.2.2   4.4.2   5.0.4  audio-interface-of-internet-archive
mocha                    5.1.1   5.2.0   5.2.0  audio-interface-of-internet-archive
node-fetch               2.1.2   2.2.0   2.2.0  audio-interface-of-internet-archive
raven                    2.6.0   2.6.3   2.6.3  audio-interface-of-internet-archive
sinon                    5.0.7   5.1.1   6.1.4  audio-interface-of-internet-archive
sinon-chai               3.0.0   3.2.0   3.2.0  audio-interface-of-internet-archive
virtual-alexa            0.5.1   0.5.1   0.6.6  audio-interface-of-internet-archive