Bump axios from 0.18.0 to 0.18.1

[dependabot[bot]]

Bumps axios from 0.18.0 to 0.18.1.

Release notes

*Sourced from [axios's releases](https://github.com/axios/axios/releases).* > ## v0.18.1 > Security Fix: > > - Destroy stream on exceeding maxContentLength (fixes [#1098](https://github-redirect.dependabot.com/axios/axios/issues/1098)) ([#1485](https://github-redirect.dependabot.com/axios/axios/issues/1485)) - Gadzhi Gadzhiev

Changelog

*Sourced from [axios's changelog](https://github.com/axios/axios/blob/v0.18.1/CHANGELOG.md).* > ### 0.18.1 (May 31, 2019) > > Security Fix: > > - Destroy stream on exceeding maxContentLength (fixes [#1098](https://github-redirect.dependabot.com/axios/axios/issues/1098)) ([#1485](https://github-redirect.dependabot.com/axios/axios/pull/1485)) - Gadzhi Gadzhiev

Commits

- [`face016`](https://github.com/axios/axios/commit/face0165de613696d10b1fd2a0e2f7b3852fa018) Releasing 0.18.1 - [`0628763`](https://github.com/axios/axios/commit/062876378b2e46aa12cb084dce56dddde1f8172c) Update Changelog for release (0.18.1) - [`dc9b29c`](https://github.com/axios/axios/commit/dc9b29c3411f160009570d369013585693deb154) adjust README to match IE support - [`16326d5`](https://github.com/axios/axios/commit/16326d5fe93bb2bf9d793fe04786e3198f298429) Remove usages of isOldIE in tests - [`5a4228b`](https://github.com/axios/axios/commit/5a4228b9f82ef9dfb695e10c95d237f4b7afdc14) Remove IE10 launcher from karma config - [`695b5f7`](https://github.com/axios/axios/commit/695b5f7241d7a3b339a768e3d04cfa5d1efd758e) Remove isOldIE check in tests - [`e314ab0`](https://github.com/axios/axios/commit/e314ab00b48be01283f4c48fc2ecaef73fac7c85) Remove HTTP 1223 handling - [`7efa822`](https://github.com/axios/axios/commit/7efa822b2e8ac47c54f3eafc7fb0c6b52ffaa0c6) Remove btoa polyfill tests - [`f3cdcc7`](https://github.com/axios/axios/commit/f3cdcc7f0125a069998bb3c74337fea99dd98f7b) Delete btoa polyfill - [`efc0b58`](https://github.com/axios/axios/commit/efc0b581c828fe0e5e6d39a40d65d1c73181e05c) Remove ie8/9 special CORS treatment and btoa polyfill - Additional commits viewable in [compare view](https://github.com/axios/axios/compare/v0.18.0...v0.18.1)

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[dependabot[bot]]

Looks like axios is no longer a dependency, so this is no longer needed.