Drop support for Python <3.7.2 (#4643)

* Drop support for 3.7.1 + 3.7.2

* Rm root level setup.py

* Rm 'dbt' pkg from build-dist script

* Fixup changelog

CHANGELOG.md

@@ -10,7 +10,8 @@
 ### Under the hood
 - Testing cleanup ([#4496](https://github.com/dbt-labs/dbt-core/pull/4496), [#4509](https://github.com/dbt-labs/dbt-core/pull/4509))
 - Clean up test deprecation warnings ([#3988](https://github.com/dbt-labs/dbt-core/issue/3988), [#4556](https://github.com/dbt-labs/dbt-core/pull/4556))
-- Use mashumaro for serialization in event logging ([#4504](https://github.com/dbt-labs/dbt-core/issue/4504), [#4505](https://github.com/dbt-labs/dbt-core/pull/4505))
+- Use mashumaro for serialization in event logging ([#4504](https://github.com/dbt-labs/dbt-core/issues/4504), [#4505](https://github.com/dbt-labs/dbt-core/pull/4505))
+- Drop support for Python 3.7.0 + 3.7.1 ([#4584](https://github.com/dbt-labs/dbt-core/issues/4584), [#4585](https://github.com/dbt-labs/dbt-core/pull/4585), [#4643](https://github.com/dbt-labs/dbt-core/pull/4643))
 
 Contributors:
 - [@NiallRees](https://github.com/NiallRees) ([#4447](https://github.com/dbt-labs/dbt-core/pull/4447))

core/setup.py

@@ -2,9 +2,9 @@
 import os
 import sys
 
-if sys.version_info < (3, 7):
+if sys.version_info < (3, 7, 2):
     print('Error: dbt does not support this version of Python.')
-    print('Please upgrade to Python 3.7 or higher.')
+    print('Please upgrade to Python 3.7.2 or higher.')
     sys.exit(1)
 
 
@@ -85,5 +85,5 @@
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
     ],
-    python_requires=">=3.7",
+    python_requires=">=3.7.2",
 )

scripts/build-dist.sh

@@ -23,7 +23,4 @@ do
     cp -r "$DBT_PATH"/"$SUBPATH"/dist/* "$DBT_PATH"/dist/
 done
 
-cd "$DBT_PATH"
-$PYTHON_BIN setup.py sdist
-
 set +x