CSRF tokens handling improved + dependencies updated

• #163 enhancement - Use arrow functions to preserve lexical 'this' instead of 'self' (by @Krinkle)
• #164 bug - [Snyk] Fix for 1 vulnerabilities (by @snyk-bot)
• #165 enhancement - Test using Node.js 14 too
• #166 enhancement - Add Scribunto console/remoting examples (by @ghost)
• #167 dependencies - Bump request from 2.88.0 to 2.88.2 (by @dependabot[bot])
• #168 dependencies - Bump eslint-config-wikimedia from 0.15.1 to 0.16.1 (by @dependabot[bot])
• #171 dependencies - Bump vows from 0.8.2 to 0.8.3 (by @dependabot[bot])
• #173 dependencies - Bump underscore from 1.9.1 to 1.10.2 (by @dependabot[bot])
• #174 dependencies - Bump eslint-config-wikimedia from 0.16.1 to 0.16.2 (by @dependabot[bot])
• #176 dependencies - Bump async from 2.6.1 to 3.2.0 (by @dependabot[bot])
• #177 dependencies - Bump csv-string from 3.1.5 to 4.0.1 (by @dependabot[bot])
• #180 dependencies - Bump node-version-compare from 1.0.1 to 1.0.2 (by @dependabot[bot])
• #181 dependencies - Bump diff from 3.5.0 to 4.0.2 (by @dependabot[bot])
• #196 dependencies - Bump lodash from 4.17.15 to 4.17.19 (by @dependabot[bot])
• #214 dependencies - Bump node-version-compare from 1.0.2 to 1.0.3 (by @dependabot[bot])
• #218 bug - CSRF token should be sent as last parameter in request payload (by @jwbth)
• #219 pr - Send CSRF token as last parameter in request payload (#218) (by @jwbth)
• #221 dependencies - Bump eslint-config-wikimedia from 0.16.2 to 0.17.0 (by @dependabot[bot])
• #223 pr - Add bot.getImagesFromArticleWithOptions.
• #230 dependencies - build(deps): bump underscore from 1.10.2 to 1.11.0 (by @dependabot[bot])
• #256 dependencies - build(deps): bump snyk from 1.413.2 to 1.416.0 (by @dependabot[bot])
• #266 dependencies - build(deps): bump diff from 4.0.2 to 5.0.0 (by @dependabot[bot])
• #274 dependencies - build(deps): bump underscore from 1.11.0 to 1.12.0 (by @dependabot[bot])
• #285 dependencies - build(deps): bump ini from 1.3.5 to 1.3.8 (by @dependabot[bot])
• #293 dependencies - build(deps-dev): bump eslint-config-wikimedia from 0.17.0 to 0.18.0 (by @dependabot[bot])
• #295 pr - Get rid of snyk - dependabot takes care of dependencies upgrade + security advisory