Update dependencies to latest available versions as of May 2020

[dhagberg-sf]

• Update jsforce version to 1.10.0

Dependencies:

• base64-url: 2.2.0 => 2.3.3
• coffeescript: 1.10.0 => 2.5.1
• commander: 2.9.0 => 5.1.0
• csv-parse: 4.6.3 => 4.9.0
• csv-stringify: 1.0.4 => 5.5.0
• faye: 1.2.0 => 1.2.5
• inherits: 2.0.1 => 2.0.4
• lodash: 4.7.15 => 4.7.15
• multistream: 2.0.5 => 4.0.0
• opn 5.3.0 => open: 7.0.3 (note: package change)
• promise: 7.1.1 => 8.1.0
• readable-stream: 2.1.0 => 3.6.0
• request: 2.72.0 => 2.88.2
• xml2js: 0.4.16 => 0.4.23

DevDependencies:

• async: 1.5.2 => 3.2.0
• browserify: 16.2.2 => 16.5.1
• bufferutil: 4.0.0 => 4.0.1
• envify: 3.4.1 => 4.1.0
• gulp: 4.0.0 => 4.0.2
• gulp-rename: 1.4.0 => 2.0.0
• gulp-sourcemaps: 1.12.1 => 2.6.5
• gulp-uglify 1.5.4 => gulp-terser 1.2.0 (Note: minifier/uglifier change)
• jsdoc: 3.6.3 => 3.6.4
• mocha: 5.2.0 => 7.1.2
• power-assert: 1.6.0 => 1.6.1
• puppeteer: 1.18.1 => 3.0.4
• testem: 2.8.2 => 3.1.0
• through2: 2.0.3 => 3.0.1
• utf-8-validate: 5.0.1 => 5.0.2

Passes same tests as jsforce master branch (fails same tests also)