Bumped min Python version to 3.7 + fixing CI

.github/workflows/python-package.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
 
     steps:
     - uses: actions/checkout@v2

README.md

@@ -1,14 +1,14 @@
 # iceaddr
 
 [![License](https://img.shields.io/badge/License-BSD%203--Clause-blue.svg)](https://opensource.org/licenses/BSD-3-Clause)
-[![Python 3.6](https://img.shields.io/badge/python-3.6-blue.svg)](https://www.python.org/downloads/release/python-360/)
+[![Python 3.7](https://img.shields.io/badge/python-3.7-blue.svg)](https://www.python.org/downloads/release/python-370/)
 [![Release](https://shields.io/github/v/release/sveinbjornt/iceaddr?display_name=tag)]()
 [![PyPI](https://img.shields.io/pypi/v/iceaddr)]()
 [![Build](https://github.com/sveinbjornt/iceaddr/actions/workflows/python-package.yml/badge.svg)]()
 
 ### Look up Icelandic street addresses, postcodes and placenames
 
-`iceaddr` is a Python 3.6+ package to look up information about Icelandic streets, addresses, placenames,
+`iceaddr` is a Python 3.7+ package to look up information about Icelandic streets, addresses, placenames,
 landmarks, locations and postcodes. The underlying data is contained in a local database assembled
 from the following sources:
 

setup.py

@@ -30,7 +30,6 @@
         "Natural Language :: Icelandic",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",