lib: Add BASH_IT_DEVELOPMENT_BRANCH variable

lib/helpers.bash

@@ -181,6 +181,9 @@ _bash-it_update-() {
   if [ -z "$BASH_IT_REMOTE" ]; then
     BASH_IT_REMOTE="origin"
   fi
+  if [ -z "$BASH_IT_DEVELOPMENT_BRANCH" ]; then
+    BASH_IT_DEVELOPMENT_BRANCH="master"
+  fi
   # Defaults to stable update
   if [ -z "$1" ] || [ "$1" == "stable" ]; then
     version="stable"
@@ -192,7 +195,7 @@ _bash-it_update-() {
     fi
   else
     version="dev"
-    TARGET=${BASH_IT_REMOTE}/master
+    TARGET=${BASH_IT_REMOTE}/${BASH_IT_DEVELOPMENT_BRANCH}
   fi
 
   git fetch $BASH_IT_REMOTE --tags &> /dev/null

template/bash_profile.template.bash

@@ -18,6 +18,10 @@ export BASH_IT_THEME='bobby'
 # cloned bash-it with a remote other than origin such as `bash-it`.
 # export BASH_IT_REMOTE='bash-it'
 
+# (Advanced): Change this to the name of the main development branch if
+# you renamed it or if it was changed for some reason
+# export BASH_IT_DEVELOPMENT_BRANCH='master'
+
 # Your place for hosting Git repos. I use this for private repos.
 export GIT_HOSTING='git@git.domain.com'