Bump webpack from 4.12.1 to 4.12.2

[dependabot-preview[bot]]

Bumps webpack from 4.12.1 to 4.12.2.

Release notes

*Sourced from [webpack's releases](https://github.com/webpack/webpack/releases).* > ## v4.12.2 > # Bugfixes > > * fix crash when using invalid JSON with HMR > * fix missing modules when a side-effect-free package is root of module concatenation > * update chunkhash when entry-chunks list or prefetched chunks change

Commits

- [`c384c3f`](https://github.com/webpack/webpack/commit/c384c3fb1c162667d001f467db05e73570ddd4d2) 4.12.2 - [`9dacf86`](https://github.com/webpack/webpack/commit/9dacf8676f6bde4bb01158343a8681fd4e0a4980) Merge pull request [#7601](https://github-redirect.dependabot.com/webpack/webpack/issues/7601) from webpack/bugfix/hash-entry-chunks - [`e38e076`](https://github.com/webpack/webpack/commit/e38e076b985b4e7a0403f0391c0bc568379894e6) fixes [#7577](https://github-redirect.dependabot.com/webpack/webpack/issues/7577) - [`aab3554`](https://github.com/webpack/webpack/commit/aab3554cad2ebc5d5e9645e74fb61842e266da34) Merge pull request [#7574](https://github-redirect.dependabot.com/webpack/webpack/issues/7574) from byzyk/types/ignore-plugin - [`258d9b6`](https://github.com/webpack/webpack/commit/258d9b6bf6b16a3ee4363785bd44e05bb87e89b1) Merge pull request [#7600](https://github-redirect.dependabot.com/webpack/webpack/issues/7600) from webpack/bugfix/missing-module - [`8cb9241`](https://github.com/webpack/webpack/commit/8cb924188eb9f03755b3836d7a85caadf37abec8) Merge pull request [#7595](https://github-redirect.dependabot.com/webpack/webpack/issues/7595) from webpack/remove_circle - [`504e1d8`](https://github.com/webpack/webpack/commit/504e1d81c571353925a4a95628bf763b6fa70974) Merge pull request [#7590](https://github-redirect.dependabot.com/webpack/webpack/issues/7590) from webpack/bugfix/json-stringify - [`ab7ecb3`](https://github.com/webpack/webpack/commit/ab7ecb30ee08abd719a7ab4d79bde498cd01e90c) fixes [#7499](https://github-redirect.dependabot.com/webpack/webpack/issues/7499) - [`3e3827e`](https://github.com/webpack/webpack/commit/3e3827e9944f124326b016cfc898b4c4161701e9) Remove CircleCI - [`35a7f65`](https://github.com/webpack/webpack/commit/35a7f6586db530cb980d057ecf6b7644ba3b1f62) add test case - Additional commits viewable in [compare view](https://github.com/webpack/webpack/compare/v4.12.1...v4.12.2)

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[dependabot-preview[bot]]

Superseded by #93.