Add prebuilds for latest Node.js v10 LTS and latest Electron (v69)

[Kasalehlia]

Please create new prebuilds and a new release to include binaries for the latest Electron version (4.0.7) using NODE_MODULE_VERSION = 69

[MadLittleMods]

Relevant code is here. Feel free to add Node.js v10 in a pull request Already being done in #81

• node-usb-detection/.travis.yml

  Lines 20 to 21 in d71db25

  	- BINARY_BUILDER="true" TRAVIS_NODE_VERSION="8"
  	- BINARY_BUILDER="true" TRAVIS_NODE_VERSION="8" ARCH="x86"

• node-usb-detection/appveyor.yml

  Lines 9 to 10 in d71db25

  	- binary_builder: "true"
  	nodejs_version: "8"

[MadLittleMods]

This seems highly related to #80

[MadLittleMods]

Closing in favor of #80 as I think the electron builds come along with those updates anyway.

[Kasalehlia]

Even though #80 is closed, there are still no electron builds newer than v57. The current electron release is 5.0.0 / v70

[MadLittleMods]

@Kasalehlia There is still #85