Bump version to 0.9.3

[zack13532]

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[zack13532]

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• Bump version to 0.9.3 #94 👈 (View in Graphite)
• Enqueue calls with the OkHttp client's ExecutorService #93 : 1 other dependent PR (#97 )
• Pass index into callback #96
• Set request index as a header #95
• Use tags to assign responses to result list #92
• Remove usage of parallelStream in favor of stream #91
• Update changelog for 0.9.2 #90
• Update readme with usage examples and bump version #89
• main

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