Bump pressbooks-build-tools from 1.1.0 to 1.2.0 (#161)

Bumps [pressbooks-build-tools](https://github.com/pressbooks/pressbooks-build-tools) from 1.1.0 to 1.2.0.
<details>
<summary>Release notes</summary>

*Sourced from [pressbooks-build-tools's releases](https://github.com/pressbooks/pressbooks-build-tools/releases).*

> ## 1.2.0
> ### Minor Changes 
> 
> - Bump eslint-plugin-react from 7.11.1 to 7.12.1: [#219](https://github-redirect.dependabot.com/pressbooks/pressbooks-build-tools/issues/219)
> - Bump eslint-plugin-jquery from 1.3.2 to 1.5.0: [#218](https://github-redirect.dependabot.com/pressbooks/pressbooks-build-tools/issues/218)
> - Bump eslint from 5.10.0 to 5.11.1: [#214](https://github-redirect.dependabot.com/pressbooks/pressbooks-build-tools/issues/214)
> 
> ### Patches 
> 
> - Bump stylelint-scss from 3.4.1 to 3.4.2: [#209](https://github-redirect.dependabot.com/pressbooks/pressbooks-build-tools/issues/209)
> - [Security] Bump webpack-dev-server from 3.1.10 to 3.1.14: [#215](https://github-redirect.dependabot.com/pressbooks/pressbooks-build-tools/issues/215)
> - Bump stylelint-scss from 3.4.2 to 3.4.4: [#213](https://github-redirect.dependabot.com/pressbooks/pressbooks-build-tools/issues/213)
> - Bump eslint-config-react-app from 3.0.5 to 3.0.6: [#212](https://github-redirect.dependabot.com/pressbooks/pressbooks-build-tools/issues/212)
</details>
<details>
<summary>Commits</summary>

- [`f890c29`](f890c298bf) 1.2.0
- [`aba8ce1`](aba8ce17bc) Bump eslint from 5.10.0 to 5.11.1 ([#214](https://github-redirect.dependabot.com/pressbooks/pressbooks-build-tools/issues/214))
- [`e930274`](e930274ed3) Bump eslint-config-react-app from 3.0.5 to 3.0.6 ([#212](https://github-redirect.dependabot.com/pressbooks/pressbooks-build-tools/issues/212))
- [`e40ea1f`](e40ea1f1cb) Bump stylelint-scss from 3.4.2 to 3.4.4 ([#213](https://github-redirect.dependabot.com/pressbooks/pressbooks-build-tools/issues/213))
- [`4d65a07`](4d65a07885) [Security] Bump webpack-dev-server from 3.1.10 to 3.1.14 ([#215](https://github-redirect.dependabot.com/pressbooks/pressbooks-build-tools/issues/215))
- [`f5a69f4`](f5a69f496e) Bump eslint-plugin-jquery from 1.3.2 to 1.5.0 ([#218](https://github-redirect.dependabot.com/pressbooks/pressbooks-build-tools/issues/218))
- [`84c45ca`](84c45cad71) Bump eslint-plugin-react from 7.11.1 to 7.12.1 ([#219](https://github-redirect.dependabot.com/pressbooks/pressbooks-build-tools/issues/219))
- [`9e97b4a`](9e97b4a1eb) Bump stylelint-scss from 3.4.1 to 3.4.2 ([#209](https://github-redirect.dependabot.com/pressbooks/pressbooks-build-tools/issues/209))
- See full diff in [compare view](https://github.com/pressbooks/pressbooks-build-tools/compare/1.1.0...1.2.0)
</details>
<br />

[![Dependabot compatibility score](https://api.dependabot.com/badges/compatibility_score?dependency-name=pressbooks-build-tools&package-manager=npm_and_yarn&previous-version=1.1.0&new-version=1.2.0)](https://dependabot.com/compatibility-score.html?dependency-name=pressbooks-build-tools&package-manager=npm_and_yarn&previous-version=1.1.0&new-version=1.2.0)

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it
- `@dependabot merge` will merge this PR after your CI passes on it
- `@dependabot cancel merge` will cancel a previously requested merge
- `@dependabot reopen` will reopen this PR if it is closed
- `@dependabot ignore this [patch|minor|major] version` will close this PR and stop Dependabot creating any more for this minor/major version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)
- `@dependabot use these labels` will set the current labels as the default for future PRs for this repo and language
- `@dependabot use these reviewers` will set the current reviewers as the default for future PRs for this repo and language
- `@dependabot use these assignees` will set the current assignees as the default for future PRs for this repo and language
- `@dependabot use this milestone` will set the current milestone as the default for future PRs for this repo and language
- `@dependabot badge me` will comment on this PR with code to add a "Dependabot enabled" badge to your readme

Additionally, you can set the following in your Dependabot [dashboard](https://app.dependabot.com):
- Update frequency (including time of day and day of week)
- Automerge options (never/patch/minor, and dev/runtime dependencies)
- Pull request limits (per update run and/or open at any time)
- Out-of-range updates (receive only lockfile updates, if desired)
- Security updates (receive only security updates, if desired)

Finally, you can contact us by mentioning @dependabot.

</details>

package.json

@@ -60,7 +60,7 @@
 		"node": ">= 6.9.4"
 	},
 	"devDependencies": {
-		"pressbooks-build-tools": "^1.1.0",
+		"pressbooks-build-tools": "^1.2.0",
 		"sass": "^1.15.2",
 		"sass-loader": "^7.1.0",
 		"vue-template-compiler": "^2.5.21"