Remove the _pyast shim (#750)

Fixes #749

Author: chrisrink10

CHANGELOG.md

@@ -34,6 +34,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Removed
  * Removed the dependency `astor` for versions of Python 3.9+ (#736)
  * Removed `basilisp.__version__` in favor of using `importlib.metadata` for version info (#617)
+ * Removed a shim to Python's `ast` module to support compatibility with Python 3.6 and 3.7 (#749)
 
 ## [v0.1.0a2]
 ### Added

src/basilisp/_pyast.py

@@ -1,10 +1,10 @@
+import ast
 import itertools
 import os
 import sys
 import types
 from typing import Any, Callable, Iterable, List, Optional
 
-from basilisp import _pyast as ast
 from basilisp.lang import map as lmap
 from basilisp.lang import runtime as runtime
 from basilisp.lang.compiler.analyzer import (  # noqa
@@ -173,7 +173,7 @@ def compile_and_exec_form(
         )
     )
 
-    ast_module = ast.Module(body=form_ast)
+    ast_module = ast.Module(body=form_ast, type_ignores=[])
     ast_module = ctx.py_ast_optimizer.visit(ast_module)
     ast.fix_missing_locations(ast_module)
 
@@ -206,7 +206,7 @@ def _incremental_compile_module(
         map(_statementize, itertools.chain(py_ast.dependencies, [py_ast.node]))
     )
 
-    module = ast.Module(body=list(module_body))
+    module = ast.Module(body=list(module_body), type_ignores=[])
     module = optimizer.visit(module)
     ast.fix_missing_locations(module)
 

src/basilisp/lang/compiler/__init__.py

@@ -2004,6 +2004,7 @@ def _inline_fn_ast(
     macroed_form = reader.syntax_quote(unquoted_form)
     inline_fn_form = llist.l(
         SpecialForm.FN,
+        *([sym.symbol(genname(f"{name.name}-inline"))] if name is not None else []),
         vec.vector(binding.form for binding in inline_arity.params),
         macroed_form,
     )

src/basilisp/lang/compiler/analyzer.py

@@ -1,9 +1,9 @@
+import ast
 from enum import Enum
 from typing import Any, Dict, Optional, Union
 
 import attr
 
-from basilisp import _pyast as ast
 from basilisp.lang import keyword as kw
 from basilisp.lang import map as lmap
 from basilisp.lang.compiler.nodes import Node