Release 0.14.0 (#300)

* Introduce script to automate release

* Rakefile levelup

* Version 0.14.0

* Fix newline at end of podspec.json

* Ensure we start and end on master branch

And that we pull latest master before tagging

* CRLF at EOF

* Remove [:version] param from `release:finish` task

It can be guessed from the current podspec version

* Fix create_release task

* Ensure we run rake via bundle exec

Co-authored-by: David Jennes <djbe@users.noreply.github.com>

Co-authored-by: David Jennes <djbe@users.noreply.github.com>

Stencil.podspec.json

@@ -1,6 +1,6 @@
 {
   "name": "Stencil",
-  "version": "0.13.1",
+  "version": "0.14.0",
   "summary": "Stencil is a simple and powerful template language for Swift.",
   "homepage": "https://stencil.fuller.li",
   "license": {
@@ -13,7 +13,7 @@
   "social_media_url": "https://twitter.com/kylefuller",
   "source": {
     "git": "https://github.com/stencilproject/Stencil.git",
-    "tag": "0.13.1"
+    "tag": "0.14.0"
   },
   "source_files": [
     "Sources/*.swift"
@@ -24,7 +24,10 @@
     "tvos": "9.0"
   },
   "cocoapods_version": ">= 1.7.0",
-  "swift_versions": ["4.2", "5.0"],
+  "swift_versions": [
+    "4.2",
+    "5.0"
+  ],
   "requires_arc": true,
   "dependencies": {
     "PathKit": [