Update chai in /packages/generator/app/templates from 4.1.2 to 4.2.0

[dependencies]

Dependencies.io has updated chai (a npm dependency in /packages/generator/app/templates) from "4.1.2" to "4.2.0".

4.2.0

This is a minor release. Thank you to all of our contributors and users!

New Features

• feat(assertions): add 'still' language chain (Update electron requirement from ^6.0.4 to ^6.0.5 in /packages/generator/app/templates #1194; ScottRudiger)
• .lengthOf for Maps and Sets (Bump @storybook/theming from 5.1.9 to 5.1.10 #1110, Update electron requirement from ^6.0.0 to ^6.0.1 in /packages/generator/app/templates #1131; asbish)
• feat: Add the assert.fail([message]) interface (Bump @storybook/addon-actions from 5.1.9 to 5.1.10 #1116, Bump @storybook/addon-notes from 5.1.9 to 5.1.10 #1117; s-leroux)

Bug Fixes

• fix: remove Chai frames from .deep.equal stack (Update webpack requirement from ^4.39.0 to ^4.39.1 in /packages/generator/app/templates #1124; meeber)
• add 'catch' keyword to proxyExcludedKeys (Bump remark-breaks from 1.0.2 to 1.0.3 #1050, Bump html-reporter from 4.9.3 to 4.9.5 #1101; generalandrew)
• property assertion should only accept strings if nested (Bump postcss-preset-env from 6.6.0 to 6.7.0 #1043, Bump package-json from 6.3.0 to 6.4.0 #1044; solodynamo)
• fix: Make tests pass with --use_strict (Bump react-markdown from 4.0.8 to 4.1.0 #1034, Bump babel-eslint from 10.0.1 to 10.0.2 #1040; shvaikalesh)

Performance

• perf: Optimize proxify and stringDistance (Bump lint-staged from 9.2.0 to 9.2.1 #1098; sophiebits)
• fix: Avoid repeated String#slice calls in stringDistance (Bump lerna from 3.16.2 to 3.16.4 #1095; bmeurer)

Style

• Fix typos and remove trailing whitespaces (Bump hermione from 2.8.1 to 2.10.0 #1042; simonewebdesign)
• Remove unnecessary code (Bump @babel/core from 7.4.5 to 7.5.4 #1049; abetomo)
• Fix variable declaration (Bump lodash.template from 4.4.0 to 4.5.0 #1048; abetomo)

Tests

• test(assert): increase coverage (Bump lerna from 3.15.0 to 3.16.2 #1084, Bump focus-trap from 5.0.1 to 5.0.2 #1085; brutalcrozt)
• test: stop modifying globals in Proxy tests (Update react requirement from ^16.8.6 to ^16.9.0 in /packages/generator/app/templates #1144; meeber)

Docs

• Fix unbalanced quotes in assert.notInclude example (Bump sinon from 7.4.1 to 7.4.2 #1200; haykam821)
• docs: fix bad .string example (Bump @storybook/addon-notes from 5.1.10 to 5.1.11 #1156, Bump webpack from 4.39.1 to 4.39.2 #1157; meeber)
• fixed package npm url (Bump @storybook/theming from 5.1.10 to 5.1.11 #1151; wadie)
• Spelling (Bump core-js from 2.6.5 to 3.2.1 #1145; jsoref)
• docs: corrected spelling (Bump husky from 3.0.2 to 3.0.3 #1141; Powell-v2)
• docs: fix wrong .property chaining examples (Chain .property() assertions on objects chaijs/chai#193 (comment), Update css-loader requirement from ^3.1.0 to ^3.2.0 in /packages/generator/app/templates #1130; meeber)
• docs: improve throws examples (Bump @storybook/core-events from 5.1.9 to 5.1.10 #1113; ColinEberhardt)
• Fix typos (Bump hermione from 2.12.2 to 2.12.3 #1107; tbroadley)
• docs: correct .ok description ([Security] Bump lodash.merge from 4.6.1 to 4.6.2 #1047; shvaikalesh)

Chores

• chore: update package-lock.json (Bump electron from 6.0.5 to 6.0.6 #1198; meeber)
• Update mocha to the latest version (Update sinon requirement from ^7.3.2 to ^7.4.1 in /packages/generator/app/templates #1127)
• chore: update dependencies (Bump webpack from 4.39.1 to 4.39.2 #1157; meeber)
• Update browserify to the latest version (Bump react-dom from 16.8.6 to 16.9.0 #1135)
• chore: update Node versions in Travis config (Bump style-loader from 0.23.1 to 1.0.0 #1126; meeber)
• chore: remove Opera from Sauce config (Bump sinon from 7.3.2 to 7.4.1 #1125; meeber)
• chore: update dependencies (Bump @storybook/core from 5.1.9 to 5.1.10 #1118; meeber)
• chore: update dependencies (Update mocha requirement from ^6.1.4 to ^6.2.0 in /packages/generator/app/templates #1074; meeber)
• Chore: change coverage service (coverall to codecov) (Bump enzyme-adapter-react-16 from 1.13.0 to 1.13.1 #927, Bump webpack from 4.35.3 to 4.36.1 #1073; brutalcrozt)
• chore: add package-lock.json (Update eslint requirement from ^5.16.0 to ^6.0.1 in /packages/generator/app/templates #1013; meeber)