use pwd -P instead of $PWD to avoid symlinks

pwd -P gets the full, non-symlink path of the current directory which we can then walk up to the denv workspace - this should allow us to always mount the workspace directory as its full, real path

denv

@@ -285,9 +285,9 @@ _denv_run() {
 ###################################################################################################
 
 _denv_deduce_workspace() {
-  # start from PWD and go up directories until file .denv
+  # start from present working directory and go up directories until find .denv
   # or reach root directory
-  denv_workspace="${PWD}"
+  denv_workspace="$(pwd -P || true)"
   while [ "${denv_workspace}" != "/" ]; do
     if [ -d "${denv_workspace}/.denv" ]; then
       return 0