Update submodule lib/zsh-autoenv 7d970a0...aee9baa
Update submodule lib/zsh-autoenv 7d970a0...aee9baa

* lib/zsh-autoenv 7d970a0...aee9baa (48):
  > Merge pull request #36 from blueyed/fix-api-vars-scope
  > Merge pull request #37 from blueyed/limit-autoenv_source_parent
  > doc: fix appearance of AUTOENV_DEBUG in README
  > Use shorter echo for newlines
  > Use 'command cat'
  > Write _autoenv_check_authorized_env_file to stderr
  > Remove globals: _autoenv_source_dir, _autoenv_chpwd_prev_dir
  > Change default values: .env => .autoenv.zsh etc
  > README: clarify that it won't load any .env file
  > minor: doc for _autoenv_hash_pair
  > Update README.md
  > Merge pull request #27 from blueyed/add-doc
  > Merge pull request #26 from blueyed/rename-env-leave
  > Unset $autoenv_env_file when leaving
  > tests: streamline ZDOTDIR layout, AUTOENV_ENV_FILENAME via setup
  > Do not export AUTOENV_ENV_FILENAME, and use existing value
  > travis: fix tests
  > travis: use 'sudo make' to fix zsh test
  > Fix _autoenv_get_file_mtime for zsh 4 (no pipefail option)
  > make test_full: use zsh 4 (/opt/zsh4/bin/zsh) and zsh 5
  > travis: add zsh 4/5 to matrix
  > travis: fix env matrix (use a list)
  > Cleanup tests/varstash_export.t
  > varstash: fix get_autostash_array_name for Zsh 4.3.17 (Travis)
  > travis: use env test matrix for ZDOTDIR
  > travis: cleanup, output zsh version
  > tests: rename setup.sh to setup.zsh
  > tests: define/use $TEST_SOURCE_AUTOENV
  > make test_full: handle error return code from cram
  > varstash: remove lib functions, use zsh functions
  > varstash: add support for exported variables in subshells
  > minor: doc
  > tests: setup.sh: export TEST_AUTOENV_PLUGIN_FILE
  > Fix return value of _autoenv_source; use ': $(( .. ))'
  > Do not reset the stack variables when (re)sourcing the plugin
  > Merge pull request #25 from blueyed/set-errexit-during-setup
  > Add zgen instructions
  > Merge pull request #22 from Tarrasch/improve-and-test-zstat-integration
  > Makefile: add clean target
  > tests: setup.sh: doc / more verbose
  > tests: abort if setup fails!
  > Merge branch 'allow-disable'
  > Merge pull request #19 from Tarrasch/fix-symlink-handling
  > Merge pull request #18 from qur2/master
  > Makefile: use CURDIR instead of PWD; used with 'make -C ..'
  > Merge pull request #17 from Tarrasch/dont-cd-in-chpwd
  > Set autoenv_env_file in _autoenv_source
  > Minor cleanup: centralize call to _autoenv_stack_entered_add

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