Migrate away from electron-webpack, which is no longer maintained

[benrbray]

Right now I'm using electron-webpack to build and test this project. Unfortunately electron-webpack currently has no maintainer and as a result the current npm version is not compatible with new versions of Webpack, Electron, or TypeScript.

$ npm outdated
Package              Current   Wanted  Latest  Location                          Depended by
@types/markdown-it    10.0.3   10.0.3  12.0.1  node_modules/@types/markdown-it   noteworthy
babel-preset-solid   0.18.14  0.18.14  0.24.9  node_modules/babel-preset-solid   noteworthy
copy-webpack-plugin    6.4.1    6.4.1   7.0.0  node_modules/copy-webpack-plugin  noteworthy
dateformat             3.0.3    3.0.3   4.5.1  node_modules/dateformat           noteworthy
electron               9.4.3    9.4.3  11.3.0  node_modules/electron             noteworthy
electron-store         5.2.0    5.2.0   7.0.2  node_modules/electron-store       noteworthy
less-loader            6.2.0    6.2.0   8.0.0  node_modules/less-loader          noteworthy
markdown-it           11.0.1   11.0.1  12.0.4  node_modules/markdown-it          noteworthy
solid-js             0.18.14  0.18.14  0.24.9  node_modules/solid-js             noteworthy
typescript             3.9.9    3.9.9   4.2.2  node_modules/typescript           noteworthy
webpack               4.46.0   4.46.0  5.24.2  node_modules/webpack              noteworthy

To avoid problems in the future, it's probably time to actually dig into what electron-webpack actually does and extract some bare-minimum configuration necessary for running Noteworthy.