fix: update to Drafter 4.0.0-pre.3

Author: kylef

.circleci/config.yml

@@ -15,15 +15,9 @@ jobs:
   test:
     <<: *defaults
     steps:
-      - run:
-          name: Installing Compiler
-          command: |
-            sudo sh -c 'echo "deb http://ftp.us.debian.org/debian unstable main contrib non-free" > /etc/apt/sources.list.d/unstable.list'
-            sudo apt-get update
-            sudo apt-get install -y -t unstable gcc-7 g++-7
       - checkout
       - run: git submodule update --init --recursive
-      - run: env CC="gcc-7" CXX="g++-7" npm install
+      - run: npm install
       - run: npm test
       - persist_to_workspace:
           root: ~/repo

.travis.yml

@@ -6,14 +6,6 @@ node_js:
 - '8'
 - '6'
 - '4'
-addons:
-  apt:
-    sources:
-    - ubuntu-toolchain-r-test
-    packages:
-    - gcc-5
-    - g++-5
-env: CXX="g++-5" CC="gcc-5"
 before_install:
 - git submodule update --init --recursive
 notifications:

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Protagonist Changelog
 
+## Master
+
+This update now uses Drafter 4.0.0-pre.3. Please see [Drafter
+4.0.0-pre.3](https://github.com/apiaryio/drafter/releases/tag/v4.0.0-pre.3) for
+the list of changes.
+
 ## 2.0.0-pre.4
 
 ### Enhancements