fix: do not make package.json's version mandatory

Author: pvdlg

lib/get-pkg.js

@@ -12,10 +12,6 @@ module.exports = async pkgRoot => {
     if (!pkg.name) {
       errors.push(new SemanticReleaseError('No "name" found in package.json.', 'ENOPKGNAME'));
     }
-
-    if (!pkg.version) {
-      errors.push(new SemanticReleaseError('No "version" found in package.json.', 'ENOPKGVERSION'));
-    }
   } catch (err) {
     if (err.code === 'ENOENT') {
       errors.push(new SemanticReleaseError('A package.json file is required to release on npm.', 'ENOPKG'));

test/get-pkg.test.js

@@ -50,26 +50,6 @@ test.serial('Throw error if missing package name', async t => {
   t.is(error.code, 'ENOPKGNAME');
 });
 
-test.serial('Throw error if missing package version', async t => {
-  await outputJson('./package.json', {name: 'package'});
-
-  const [error] = await t.throws(getPkg());
-
-  t.is(error.name, 'SemanticReleaseError');
-  t.is(error.code, 'ENOPKGVERSION');
-});
-
-test.serial('Throw errors if missing package version and name', async t => {
-  await outputJson('./package.json', {});
-
-  const errors = [...(await t.throws(getPkg()))];
-
-  t.is(errors[0].name, 'SemanticReleaseError');
-  t.is(errors[0].code, 'ENOPKGNAME');
-  t.is(errors[1].name, 'SemanticReleaseError');
-  t.is(errors[1].code, 'ENOPKGVERSION');
-});
-
 test.serial('Throw error if package.json is malformed', async t => {
   await writeFile('./package.json', "{name: 'package',}");
 

test/integration.test.js

@@ -144,8 +144,6 @@ test.serial('Throw SemanticReleaseError Array if config option are not valid in
   t.is(errors[2].code, 'EINVALIDPKGROOT');
   t.is(errors[3].name, 'SemanticReleaseError');
   t.is(errors[3].code, 'ENOPKGNAME');
-  t.is(errors[4].name, 'SemanticReleaseError');
-  t.is(errors[4].code, 'ENOPKGVERSION');
 });
 
 test.serial('Publish the package', async t => {
@@ -257,8 +255,6 @@ test.serial('Throw SemanticReleaseError Array if config option are not valid in
   t.is(errors[2].code, 'EINVALIDPKGROOT');
   t.is(errors[3].name, 'SemanticReleaseError');
   t.is(errors[3].code, 'ENOPKGNAME');
-  t.is(errors[4].name, 'SemanticReleaseError');
-  t.is(errors[4].code, 'ENOPKGVERSION');
 });
 
 test.serial('Verify token and set up auth only on the fist call', async t => {