[FIX] Include support for tokens and costs for AWS Bedrock models (#189)

Added input and output token variables in token_counter.py for aws bedrock

Author: pk-zipstack

src/unstract/sdk/__init__.py

@@ -1,4 +1,4 @@
-__version__ = "v0.73.0"
+__version__ = "v0.73.1"
 
 
 def get_sdk_version() -> str:

src/unstract/sdk/utils/token_counter.py

@@ -95,11 +95,13 @@ def _get_tokens_from_response(
             "prompt_tokens",
             "input_tokens",
             "prompt_eval_count",
+            "inputTokens",
         )
         possible_output_keys = (
             "completion_tokens",
             "output_tokens",
             "eval_count",
+            "outputTokens",
         )
 
         prompt_tokens = 0