Use Dict to make the code python 3.8 compatible

lm_eval/prompts/__init__.py

 import ast
 
+from typing import Dict
 from lm_eval import utils
 from lm_eval.logger import eval_logger
 
@@ -7,7 +8,7 @@ from lm_eval.logger import eval_logger
 # Stores prompts in a dictionary indexed by 2 levels:
 # prompt category name, and prompt name.
 # This allows us to access prompts
-PROMPT_REGISTRY: dict[str, dict[str, str]] = {
+PROMPT_REGISTRY: Dict[str, Dict[str, str]] = {
     "qa-basic": {
         "question-newline-answer": "Question: {{question}}\nAnswer:",
         "q-newline-a": "Q: {{question}}\nA:",

lm_eval/tasks/__init__.py

 import os
 import yaml
-from typing import List, Union
+from typing import List, Union, Dict
 
 from lm_eval import utils
 from lm_eval import prompts
@@ -15,7 +15,7 @@ from lm_eval.api.registry import (
 )
 
 
-def register_configurable_task(config: dict[str, str]) -> int:
+def register_configurable_task(config: Dict[str, str]) -> int:
     SubClass = type(
         config["task"] + "ConfigurableTask",
         (ConfigurableTask,),
@@ -38,7 +38,7 @@ def register_configurable_task(config: dict[str, str]) -> int:
     return 0
 
 
-def check_prompt_config(config: dict[str, str]) -> List[dict[str, str]]:
+def check_prompt_config(config: Dict[str, str]) -> List[Dict[str, str]]:
     all_configs = []
     if "use_prompt" in config:
         prompt_list = prompts.load_prompt_list(
@@ -69,7 +69,7 @@ def check_prompt_config(config: dict[str, str]) -> List[dict[str, str]]:
     return all_configs
 
 
-def get_task_name_from_config(task_config: dict[str, str]) -> str:
+def get_task_name_from_config(task_config: Dict[str, str]) -> str:
     if "dataset_name" in task_config:
         return "{dataset_path}_{dataset_name}".format(**task_config)
     else:
@@ -128,7 +128,7 @@ def get_task_name_from_object(task_object):
 
 
 # TODO: pass num_fewshot and other cmdline overrides in a better way
-def get_task_dict(task_name_list: List[Union[str, dict, Task]], **kwargs):
+def get_task_dict(task_name_list: List[Union[str, Dict, Task]], **kwargs):
 
     config = {**kwargs}