fix: case sensitivity (#52)

* fix: case insensitive header regex
* fix: case insensitivity for the `increment` plugin

Updates for the zeke/semantic-pull-requests#39 and conventional-commits/conventionalcommits.org#110

Signed-off-by: Charlike Mike Reagent <mameto2011@gmail.com>

src/header.js

@@ -37,7 +37,7 @@ export function parseHeader(header) {
 
   // because the last question mark, which we totally need
   // eslint-disable-next-line unicorn/no-unsafe-regex
-  const regex = /^(\w+)(?:\((.+)\))?: (.+)$/;
+  const regex = /^(\w+)(?:\((.+)\))?: (.+)$/i;
   if (!regex.test(header)) {
     throw new TypeError(errorMsg);
   }

src/plugins/increment.js

@@ -14,13 +14,13 @@ export default function increment(commit) {
   let isBreaking = isBreakingChange(commit);
   let commitIncrement = false;
 
-  if (/fix|bugfix|patch/.test(commit.header.type)) {
+  if (/fix|bugfix|patch/i.test(commit.header.type)) {
     commitIncrement = 'patch';
   }
-  if (/feat|feature|minor/.test(commit.header.type)) {
+  if (/feat|feature|minor/i.test(commit.header.type)) {
     commitIncrement = 'minor';
   }
-  if (/break|breaking|major/.test(commit.header.type) || isBreaking) {
+  if (/break|breaking|major/i.test(commit.header.type) || isBreaking) {
     commitIncrement = 'major';
   }
   isBreaking = isBreaking || commitIncrement === 'major';