The old favicon was the same as the official react documentation, which is a minor annoyance during development when trying to find the tab you want. The new favicon is just the old with inverted colors.

Closes #7957

- Remove templates version minimum stopgap.
- Replace indexOf with more idiomatic alternatives.
- Inline errorLogFilePatterns.
- Alphabetize validFiles.
- Simplify log file removal code.
- Move unconditional console.log() call outside of isSafe.
- Differentiate conflicting directories from files.
- Document yarn version special case.
- Inline printValidationResults.
- Standardize checkAppName output on failure.
- Add link for checkThatNpmCanReadCwd.

Functionally the code should be exactly the same.

* Add package-runner note to readme

* Add link to `yarn create`

* Bump dependencies in react-dev-utils

* Bump dependencies in react-app-polyfill

* Bump dependencies in create-react-app

* Bump dependencies in react-error-overlay

* Bump dependencies in react-scripts

* Bump react

Make the --info subcommand outuput the current version information and the location of the file being run. Our issue template tells users to provide the output of --info, so having the current version is incredibly helpful, especially since it doesn't necessarily match the globally installed version that envinfo outputs. Knowing the location helps us determine whether the running bin is globally installed or in the local node_modules.

* security: update terser webpack plugin

This is just a comment fix.

Actual optional chaining operator syntax is `?.`, not `.?`.

Declare namespaces are supported by babel now, and babel will throw with a nice error message for non-declare namespaces, so this rule is unnecessary. Closes #7651.

 - babel-plugin-named-asset-import@0.3.5
 - babel-preset-react-app@9.1.0
 - cra-template-typescript@1.0.0
 - cra-template@1.0.0
 - create-react-app@3.3.0
 - eslint-config-react-app@5.1.0
 - react-app-polyfill@1.0.5
 - react-dev-utils@10.0.0
 - react-error-overlay@6.0.4
 - react-scripts@3.3.0

* Update template docs

* Update custom-templates.md

* Update custom-templates.md


Co-authored-by: Ian Sutherland <ian@iansutherland.ca>

Fixes issues with optional chaining