feat: Drop py37 support (#41)

# Description

- drop python 3.7 support
- update how dependency group is specified in pyproject file that is
compliant with poetry 1.2+
- rerun `poetry lock` to generate a new lockfile 
- update documentation for `tables` configuration parameter

.github/workflows/ci_workflow.yml

@@ -44,7 +44,7 @@ jobs:
       SF_ROLE: ${{secrets.SF_ROLE}}
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.8", "3.9", "3.10", "3.11"]
 
     steps:
     - uses: actions/checkout@v3

README.md

@@ -21,6 +21,24 @@ tap is available by running:
 tap-snowflake --about
 ```
 
+### `tables` configuration parameter.
+
+An array of the table names that you want to sync. The table names should be fully qualified, including schema and table name.
+
+NOTES: 
+* This limits discovery to the tables specified for performance reasons. Do not specify `tables` if you intend to discover the entire available catalog.
+* Syntax to specify `tables` differs slightly from `select` (`schema_name.table_name` vs `schema_name-table_name.*`)
+
+:bulb: When adding more elements to `select` ensure the table is specified in `tables` if using `tables`. 
+
+Example:
+```yaml
+  ...
+  tables:
+    - schema_name1.table1
+    - schema_name1.table2
+```
+
 ### Configure using environment variables
 
 This Singer tap will automatically import any environment variables within the working directory's