Update dependency parcel-bundler to v1.12.4

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
parcel-bundler	devDependencies	patch	1.12.3 -> 1.12.4

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Release Notes

parcel-bundler/parcel

### [`v1.12.4`](https://togithub.com/parcel-bundler/parcel/blob/master/CHANGELOG.md#​1124---2019-10-06) [Compare Source](https://togithub.com/parcel-bundler/parcel/compare/parcel-bundler@1.12.3...parcel-bundler@1.12.4) - BUG: postcss module generates wrong hashes [Details](https://togithub.com/parcel-bundler/parcel/pull/2922) - Shake exports with pure property assignments [Details](https://togithub.com/parcel-bundler/parcel/pull/2979) - Clear scope cache before crawling to fix scope hoisting classes [Details](https://togithub.com/parcel-bundler/parcel/pull/2986) - Replace module.require in scope hoisting [Details](https://togithub.com/parcel-bundler/parcel/pull/2875) - Define \_\_esModule interop flag when requiring ES module from CommonJS [Details](https://togithub.com/parcel-bundler/parcel/pull/2993) - Fix assigning to exports from inside a function in scope hoisting [Details](https://togithub.com/parcel-bundler/parcel/pull/2994) - Added new `parcel info` command [Details](https://togithub.com/parcel-bundler/parcel/pull/3068) - Fix Scope hoisting destructuring [Details](https://togithub.com/parcel-bundler/parcel/pull/2742) - HMR update breaks in webworker [Details](https://togithub.com/parcel-bundler/parcel/pull/3078) - Update dotenv-expand to allow overriding with falsy values [Details](https://togithub.com/parcel-bundler/parcel/pull/2971) - bump chokidar to get a reload fix for linux [Details](https://togithub.com/parcel-bundler/parcel/pull/2878) - Upgrading serialize-to-js from 1.1.1 to 3.0.0 [Details](https://togithub.com/parcel-bundler/parcel/pull/3451) - Fix source map on CoffeeScript assets [Details](https://togithub.com/parcel-bundler/parcel/pull/3423)

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