Merge remote-tracking branch 'remotes/origin/develop' into antlr4

# Conflicts:
#	.travis.yml
#	requirements.txt

Author: Bernardo-MG

.travis.yml

@@ -3,9 +3,9 @@
 
 # Using Python for the project
 language: python
-  python:
-    - "3.7"
-    - "3.8"
+python:
+  - "3.7"
+  - "3.8"
 matrix:
   include:
     # Tests and deploys docs, also runs coverage report
@@ -18,7 +18,7 @@ addons:
 
 before_install:
   # Gets scripts
-  - git clone -b v1.2.2 --single-branch https://github.com/Bernardo-MG/ci-shell-scripts.git ~/.scripts
+  - git clone -b v1.2.1 --single-branch https://github.com/Bernardo-MG/ci-shell-scripts.git ~/.scripts
   # Sets scripts as executable
   - chmod -R +x ~/.scripts/*
   # Prepares CI environment