'object' is a reserved keyword PHP >= 7.2

Problem/Motivation

While testing PHP 7.3 compatibility, I've run into the following errors:

FILE: /mnt/src/web/modules/contrib/jsonrpc/src/Object/Request.php
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FOUND 1 ERROR AFFECTING 1 LINE
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 3 | ERROR | 'object' is a soft reserved keyword as of PHP version 7.0 and a reserved keyword as of PHP version 7.2 and
   |       | should not be used to name a class, interface or trait or as part of a namespace (T_NAMESPACE)
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FILE: /mnt/src/web/modules/contrib/jsonrpc/src/Object/Error.php
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FOUND 1 ERROR AFFECTING 1 LINE
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 3 | ERROR | 'object' is a soft reserved keyword as of PHP version 7.0 and a reserved keyword as of PHP version 7.2 and
   |       | should not be used to name a class, interface or trait or as part of a namespace (T_NAMESPACE)
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FILE: /mnt/src/web/modules/contrib/jsonrpc/src/Object/ParameterBag.php
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FOUND 1 ERROR AFFECTING 1 LINE
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 3 | ERROR | 'object' is a soft reserved keyword as of PHP version 7.0 and a reserved keyword as of PHP version 7.2 and
   |       | should not be used to name a class, interface or trait or as part of a namespace (T_NAMESPACE)
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Proposed resolution

Rename Object to Obj.