failed to resolve me.answershahriar:calligrapher:1.0 : I am trying to create a calculator.  I want to add a library to add font.
so I added 

    compile 'me.answershahriar:calligraper:4.0'
but I got error 
failed to resolve 'me.answershahriar:calligraper:4.0'
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I am using android studio 2.2 and compilesdk version 28

