fix(package): update execa to version 2.0.0

Author: greenkeeper[bot]

lib/exec.js

@@ -8,7 +8,7 @@ module.exports = async (cmdProp, {shell, execCwd, ...config}, {cwd, env, stdout,
 
   logger.log('Call script %s', script);
 
-  const result = execa.shell(script, {shell, cwd: execCwd ? path.resolve(cwd, execCwd) : cwd, env});
+  const result = execa(script, {shell: shell || true, cwd: execCwd ? path.resolve(cwd, execCwd) : cwd, env});
 
   result.stdout.pipe(
     stdout,

package.json

@@ -19,7 +19,7 @@
     "@semantic-release/error": "^2.1.0",
     "aggregate-error": "^3.0.0",
     "debug": "^4.0.0",
-    "execa": "^1.0.0",
+    "execa": "^2.0.0",
     "lodash": "^4.17.4",
     "parse-json": "^4.0.0"
   },