fix: revert execa update to fix Lerna CLI error

package.json

@@ -145,7 +145,7 @@
     "husky": "^3.0.0",
     "jest": "^24.8.0",
     "jsonwebtoken": "^8.5.1",
-    "lerna": "3.15.0",
+    "lerna": "^3.20.2",
     "lint-staged": "^9.5.0",
     "lit-element": "^2.2.0",
     "lit-html": "^1.1.1",
@@ -166,9 +166,6 @@
     "stylelint-order": "^3.0.1",
     "stylelint-scss": "^3.9.2"
   },
-  "resolutions": {
-    "execa": "^4.0.0"
-  },
   "publishConfig": {
     "access": "public"
   }

packages/build-tools/utils/package.json

@@ -19,7 +19,7 @@
     "convert-hrtime": "^3.0.0",
     "cosmiconfig": "^5.2.1",
     "del": "^4.1.1",
-    "execa": "^4.0.0",
+    "execa": "^1.0.0",
     "js-yaml": "^3.13.1",
     "jsonschema": "^1.2.4",
     "node-cache": "^4.2.0",

packages/testing/testing-utils/cli/list-pkg-paths-changed.js

@@ -31,7 +31,7 @@ if (process.env.TRAVIS === 'true') {
     },
   ].forEach(step => {
     process.stderr.write(`${step.label}\n`);
-    const results = execa.sync(step.cmd);
+    const results = execa.shellSync(step.cmd);
     if (results.failed) {
       process.stderr.write(`Uh oh, this Travis git step failed:\n`);
       process.stderr.write(`${results.stderr}\n`);

packages/testing/testing-utils/test-utils.js

@@ -10,7 +10,7 @@ const findPkg = require('find-pkg');
  * helper function to get gitSha without needing a GITHUB_TOKEN (for local dev);
  * @returns {string} git sha of last commit
  */
-const gitSha = execa.sync('git', ['rev-parse', '--short', 'HEAD']).stdout;
+const gitSha = execa.shellSync('git', ['rev-parse', '--short', 'HEAD']).stdout;
 
 const repoRoot = join(__dirname, '../../..');
 const lernaCli = join(repoRoot, 'node_modules/.bin/lerna');
@@ -138,7 +138,7 @@ function getFilesChanged({ from = 'HEAD', base = 'master', inDir } = {}) {
   const cmds = ['git', 'diff', '--name-only', `${base}...${from}`];
   if (inDir) cmds.push(inDir);
   try {
-    const results = execa.sync(cmds.join(' '), {
+    const results = execa.shellSync(cmds.join(' '), {
       cwd: repoRoot,
     });
     const files = results.stdout.split('\n');

scripts/package.json

@@ -13,7 +13,7 @@
   "dependencies": {
     "@zeit/fetch-retry": "^3.0.0",
     "ci-utils": "^0.5.0",
-    "execa": "^4.0.0",
+    "execa": "^1.0.0",
     "git-semver-tags": "^2.0.2",
     "jsonwebtoken": "^8.4.0",
     "lodash": "^4.17.11",

scripts/utils.js

@@ -6,7 +6,7 @@ const execa = require('execa');
  * helper function to get gitSha without needing a GITHUB_TOKEN (for local dev);
  * @returns {string} git sha of last commit
  */
-const gitSha = execa.sync('git', ['rev-parse', '--short', 'HEAD']).stdout;
+const gitSha = execa.shellSync('git', ['rev-parse', '--short', 'HEAD']).stdout;
 
 /**
  * @param {Object} opt