Fix incorrect requirements line for dotenv (#193)

* Fix incorrect requirements line for dotenv

* Also use requirements.txt in CI jobs

.github/workflows/greentea_cmake.yml

@@ -10,10 +10,9 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v3
 
-      - name: Install the latest mbed-tools
+      - name: Install Python packages
         run: |
-            pip3 install --upgrade mbed-tools
-            mbedtools --version
+            python3 -m pip install -r tools/requirements.txt
 
       - name: Build NUCLEO_G031K8 with baremetal profile
         run: |

.github/workflows/test_building_multiple_executables.yml

@@ -10,6 +10,10 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v3
         
+      - name: Install Python packages
+        run: |
+            python3 -m pip install -r tools/requirements.txt
+
       - name: Build the multiple_executables example
         run: |
             cd tools/cmake/tests/multiple_executables/

tools/requirements.txt

@@ -7,7 +7,7 @@ prettytable>=2.0,<4.0; python_version >= '3.6'
 future>=0.18.0,<1.0
 jinja2>=2.11.3
 intelhex>=2.3.0,<3.0.0
-dotenv
+python-dotenv
 Click>=7.1,<9
 GitPython
 tqdm