README: Explicitly mention the oldest supported Emacs
Avoid calling syntax-propertize-rules as may be unavailable.

Instead of using the macro syntax-propertize-rules, use the evaluated
macro. Older Emacs may not have the macro available, the final
function is short and easy to understand.

GitHub-Issue: 134
Create a unit test for highlighting interpolated variables

GitHub-Issue: 136
Add more tests for highlighting variable interpolation

Suggested-by: Chris Rasys
GitHub-Issue: 136
Guard propertize functions for Emacs that don't support it.
Append file patterns to auto-mode-alist

Some other modes stake a claim to PHP files, e.g. mmm-mode.  PHP Mode
blasts over auto-mode-alist and depending on the order in which a user
loads each PHP Mode may usurp association with PHP files from the
other modes, and that can be annoying to users of those other modes.
This patch appends the file patterns for PHP Mode to the end of
auto-mode-alist so that they will not over-shadow any existing
associations which may already exist.

GitHub-Issue: #32
GitHub-Issue: #105
GitHub-Issue: purcell/mmm-mode#32
Merge commit '38e1940e950d47737fed30a5bd5d4e75e0faf103'

* commit '38e1940e950d47737fed30a5bd5d4e75e0faf103':
  Guard propertize functions for Emacs that don't support it.
  Avoid calling syntax-propertize-rules as may be unavailable.
Merge branch 'ejmr/highlight-variables-in-strings'

* ejmr/highlight-variables-in-strings:
  Add more tests for highlighting variable interpolation
  Create a unit test for highlighting interpolated variables
Update version to 1.13
README: Stress that I am looking for a new maintainer
Added missing contributors

see release 1.2 changelog:
Urban Müller
Engelke Eschner

Signed-off-by: Eric James Michael Ritz <lobbyjones@gmail.com>
Fix indentation for closures

Credit for this fix goes to Jakub Jankiewicz who provided not only the
bug report but also the solution of removing php-unindent-closure.

GitHub-Issue: Fixes #145
Merge tag 'v1.13.1' of https://github.com/ejmr/php-mode

Version 1.13.1