update docs

Author: raman325

docs/new_features.rst

@@ -37,7 +37,8 @@ The new features since 0.32 in master include:
   @dlashua (#50, #62).
 - Required Python packages can be specified in ``requirements.txt`` files at the top-level pyscript
   directory, and each module's or app's directory. Those files are read and any missing packages are
-  installed on HASS startup and pyscript reload. Contributed by @raman325 (#66, #68, #69).
+  installed on HASS startup and pyscript reload. If a specific version of a package is needed, it must be
+  pinned using the format 'package_name==version'. Contributed by @raman325 (#66, #68, #69, #70, #78).
 - State variable attributes can be set by direct assignment, eg: ``DOMAIN.name.attr = value``. A
   equivalent new function ``state.setattr()`` allows a specific attribute to be set.
 - The ``state.get_attr()`` function has been renamed ``state.getattr()``. The old function is

docs/reference.rst

@@ -1090,9 +1090,12 @@ version of that package, eg:
 
    # this is a comment
    aiohttp
-   amazing_stuff>=3.1
+   amazing_stuff==3.1
    another_package==5.1.2
 
+When a specific version of a package is required, the ``==`` specifier must be used. Unpinned packages
+(no version specified) are also accepted.
+
 Each app's or module's directory (assuming they use the directory-form of a package) can also
 contain an optional ``requirements.txt`` file:
 
@@ -1108,6 +1111,9 @@ If a required package version differs from the installed one, no change is made
 HASS has a requirement that pyscript should not change. In that case a warning message will be
 logged and the requirement will be skipped.
 
+When a package appears multiple times across all of your ``requirements.txt`` definitions, the
+highest version specified will be installed.
+
 Trigger Closures
 ^^^^^^^^^^^^^^^^