docs/GettingStarted: Update instructions #321
Merged
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Update composer instructions
Fixes
Deprecation warning: require.Microsoft/tolerant-php-parser is invalid, it should not contain uppercase characters. Please use microsoft/tolerant-php-parser instead. Make sure you fix this as Composer 2.0 will error.GettingStarted: Update instructions to PHP 7.2
PHP 7.1 is no longer supported, and the project targets PHP 7.2
according to .travis.yml