chore(deps): pin dependencies

This MR contains the following updates:

Package	Type	Update	Change
@vue/cli-plugin-babel	devDependencies	pin	^4.1.0 -> 4.1.2
@vue/cli-plugin-eslint	devDependencies	pin	^4.1.0 -> 4.1.2
@vue/cli-service (source)	devDependencies	pin	^4.1.0 -> 4.1.2
babel-eslint	devDependencies	pin	^10.0.3 -> 10.0.3
core-js	dependencies	pin	^3.4.4 -> 3.6.4
eslint (source)	devDependencies	pin	^5.16.0 -> 5.16.0
eslint-plugin-vue (source)	devDependencies	pin	^5.0.0 -> 5.2.3
vue	dependencies	pin	^2.6.10 -> 2.6.11
vue-template-compiler	devDependencies	pin	^2.6.10 -> 2.6.11
webpack-bundle-tracker	devDependencies	pin	^0.4.3 -> 0.4.3
whatwg-fetch	dependencies	pin	^3.0.0 -> 3.0.0

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