chore: Remove Python 3.7 from workflows

Author: lahirumaramba

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12', 'pypy3.8']
+        python: ['3.8', '3.9', '3.10', '3.11', '3.12', 'pypy3.8']
 
     steps:
     - uses: actions/checkout@v4
@@ -35,10 +35,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - name: Set up Python 3.7
+    - name: Set up Python 3.8
       uses: actions/setup-python@v5
       with:
-        python-version: 3.7
+        python-version: 3.8
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip

.github/workflows/nightly.yml

@@ -36,7 +36,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v5
       with:
-        python-version: 3.7
+        python-version: 3.8
 
     - name: Install dependencies
       run: |

.github/workflows/release.yml

@@ -47,7 +47,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v5
       with:
-        python-version: 3.7
+        python-version: 3.8
 
     - name: Install dependencies
       run: |

CONTRIBUTING.md

@@ -85,7 +85,7 @@ information on using pull requests.
 
 ### Initial Setup
 
-You need Python 3.7+ to build and test the code in this repo.
+You need Python 3.8+ to build and test the code in this repo.
 
 We recommend using [pip](https://pypi.python.org/pypi/pip) for installing the necessary tools and
 project dependencies. Most recent versions of Python ship with pip. If your development environment