autoprefixer-rails: Rails build fails in heroku on "since 2013" query

package.json: "browserslist": [ "since 2013", "ie >= 10", "> 1%" ]

error in build logs:

Module build failed: BrowserslistError: Unknown browser since at error (/tmp/build_6ac736cb6e18a13e9015579c6d8710d0/node_modules/postcss-merge-rules/node_modules/browserslist/index.js:37:11) at Function.browserslist.checkName (/tmp/build_6ac736cb6e18a13e9015579c6d8710d0/node_modules/postcss-merge-rules/node_modules/browserslist/index.js:320:18)