Added version to composer.json

This fixes #1997 by adding the `version` key to the `composer.json`
file.  The version number will be updated with newer releases as
well.

composer.json

@@ -2,6 +2,7 @@
   "name":
   "ivaynberg/select2",
   "description": "Select2 is a jQuery based replacement for select boxes.",
+  "version": "3.4.5",
   "type": "component",
   "homepage": "http://ivaynberg.github.io/select2/",
   "license": "Apache-2.0",

release.sh

@@ -28,19 +28,20 @@ git pull
 
 echo "Updating Version Identifiers"
 
-sed -E -e "s/\"version\": \"([0-9\.]+)\",/\"version\": \"$ver\",/g" -i "" bower.json select2.jquery.json component.json
+sed -E -e "s/\"version\": \"([0-9\.]+)\",/\"version\": \"$ver\",/g" -i "" bower.json select2.jquery.json component.json composer.json
 git add bower.json
 git add select2.jquery.json
 git add component.json
+git add composer.json
 git commit -m "modified version identifiers in descriptors for release $ver"
 git push
- 
+
 git branch "$branch"
 git checkout "$branch"
 
 echo "Tokenizing..."
 
-find . -name "$js" | xargs -I{} sed -e "$tokens" -i "" {} 
+find . -name "$js" | xargs -I{} sed -e "$tokens" -i "" {}
 find . -name "$css" | xargs -I{} sed -e "$tokens" -i "" {}
 sed -e "s/latest/$ver/g" -i "" bower.json
 
@@ -59,7 +60,7 @@ curl -s \
 	>> "$mini"
 
 git add "$mini"
-	
+
 git commit -m "release $ver"
 
 echo "Tagging..."