chore(docs): Fix .readthedocs.yaml and update README.md (#445)

* Add optional connection timeout to gTTS constructor

* Fix bug where filtered tokens were unused

* Fix typos

* Remove _len function; it is not needed, as Python 2 is no longer supported

* Fix .readthedocs.yml and update README.md

.readthedocs.yml

@@ -1,4 +1,22 @@
+# Read the Docs configuration file for Sphinx projects
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
 version: 2
+
+# Set the OS, Python version and other tools you might need
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3"
+
+# Build documentation in the "docs/" directory with Sphinx
+sphinx:
+  configuration: docs/conf.py
+
+# Optional but recommended, declare the Python requirements required
+# to build your documentation
+# See https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html
 python:
   install:
     - method: pip

README.md

@@ -2,7 +2,7 @@
 
 **gTTS** (*Google Text-to-Speech*), a Python library and CLI tool to interface with Google Translate's text-to-speech API. 
 Write spoken `mp3` data to a file, a file-like object (bytestring) for further audio manipulation, or `stdout`.
-<http://gtts.readthedocs.org/>
+<https://gtts.readthedocs.io/>
 
 [![PyPI version](https://img.shields.io/pypi/v/gTTS.svg)](https://pypi.org/project/gTTS/)
 [![Python versions](https://img.shields.io/pypi/pyversions/gTTS.svg)](https://pypi.org/project/gTTS/)
@@ -33,7 +33,7 @@ Module:
     >>> tts = gTTS('hello')
     >>> tts.save('hello.mp3')
 
-See <http://gtts.readthedocs.org/> for documentation and examples.
+See <https://gtts.readthedocs.io/> for documentation and examples.
 
 ### Disclaimer