Add badges for latest release, total downloads, and license
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imjerrybao/php-jwt,kevinmel2000/php-jwt,kevinmel2000/php-jwt,firebase/php-jwt,m4h4n/php-jwt,ydatech/php-jwt,johanderuijter/php-jwt,tvad911/php-jwt,imjerrybao/php-jwt,johanderuijter/php-jwt,sjones608/php-jwt,sjones608/php-jwt,tvad911/php-jwt,ydatech/php-jwt,m4h4n/php-jwt