chore(package): Update 6 devDependencies to latest

[uirouterbot]

chore(package): Update 6 devDependencies to latest

@babel/core@^7.14.8: 7.14.8 -> 7.15.5
@babel/preset-env@^7.14.9: 7.14.9 -> 7.15.6
source-map-loader@^1.1.3: 1.1.3 -> 3.0.0
webpack@^4.46.0: 4.46.0 -> 5.56.0
webpack-cli@^3.3.12: 3.3.12 -> 4.8.0
webpack-dev-server@^3.11.2: 3.11.2 -> 4.3.0

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