build(commitlint): Remove semantic-commitlint

This removes `semantic-commitlint` from both the local build pipeline and the CI build pipeline. The
original value of `semantic-commitlint` was that it would handle linting only the relevant commits,
i.e. the commit range under review for a PR. However, the library doesn't seem to respect our
altered `commitlint` rules, so we'll be switching to an alternate strategy to handle linting of
specific ranges.

#13

.circleci/config.yml

@@ -94,17 +94,6 @@ jobs:
           paths:
             - css
 
-  commitlint:
-    <<: *defaults
-
-    steps:
-      - attach_workspace:
-          at: .
-
-      - run:
-          name: Lint commit messages
-          command: npx semantic-commitlint -- --ci
-
   lint:
     <<: *defaults
 
@@ -179,9 +168,6 @@ workflows:
       # - coverage:
       #     requires:
       #       - install-dependencies
-      - commitlint:
-          requires:
-            - install-dependencies
       - lint:
           requires:
             - install-dependencies

package.json

@@ -14,7 +14,6 @@
     "storybook": "start-storybook -p 6006",
     "build:storybook": "build-storybook",
     "deploy": "npm run build",
-    "semantic-commitlint": "semantic-commitlint",
     "semantic-release": "semantic-release",
     "commit": "git-cz",
     "commit:retry": "git-cz --retry",
@@ -55,7 +54,6 @@
     "postcss-cli": "^6.0.0",
     "prettier": "^1.15.2",
     "rimraf": "^2.6.2",
-    "semantic-commitlint": "^1.3.2",
     "semantic-release": "^15.12.3",
     "stylelint": "^9.5.0",
     "stylelint-config-prettier": "^4.0.0",
@@ -72,8 +70,16 @@
       "@commitlint/config-conventional"
     ],
     "rules": {
-      "subject-case": [0, "never", "sentence-case"],
-      "subject-full-stop": [0, "never", "."]
+      "subject-case": [
+        0,
+        "never",
+        "sentence-case"
+      ],
+      "subject-full-stop": [
+        0,
+        "never",
+        "."
+      ]
     }
   },
   "husky": {
@@ -95,11 +101,6 @@
   "prettier": {
     "printWidth": 100
   },
-  "release": {
-    "verifyRelease": [
-      "semantic-commitlint"
-    ]
-  },
   "stylelint": {
     "plugins": [
       "stylelint-scss",