fix: use correct ci branch context (#1521)

index.js

@@ -26,7 +26,8 @@ marked.setOptions({renderer: new TerminalRenderer()});
 /* eslint complexity: off */
 async function run(context, plugins) {
   const {cwd, env, options, logger} = context;
-  const {isCi, branch: ciBranch, isPr} = context.envCi;
+  const {isCi, branch, prBranch, isPr} = context.envCi;
+  const ciBranch = isPr ? prBranch : branch;
 
   if (!isCi && !options.dryRun && !options.noCi) {
     logger.warn('This run was not triggered in a known CI environment, running in dry-run mode.');

test/index.test.js

@@ -1258,7 +1258,7 @@ test('Allow local releases with "noCi" option', async (t) => {
 
   const semanticRelease = requireNoCache('..', {
     './lib/get-logger': () => t.context.logger,
-    'env-ci': () => ({isCi: false, branch: 'master', isPr: true}),
+    'env-ci': () => ({isCi: false, branch: 'master', isPr: false}),
   });
   t.truthy(
     await semanticRelease(options, {
@@ -1357,7 +1357,7 @@ test('Returns false if triggered by a PR', async (t) => {
 
   const semanticRelease = requireNoCache('..', {
     './lib/get-logger': () => t.context.logger,
-    'env-ci': () => ({isCi: true, branch: 'master', isPr: true}),
+    'env-ci': () => ({isCi: true, branch: 'master', prBranch: 'patch-1', isPr: true}),
   });
 
   t.false(