(ops): explicit newline for package size

LIBSIZE.md

@@ -1,5 +1,5 @@
 ### Redux Persist Size Estimate
 The following is a history of size estimates in bytes. This is calculated as a rollup minified production build, excluding the size of redux which is an assumed peer dependency. YMMV.
 
-v5.6.7: 4724 Bytes
-v5.6.8: 4724 Bytes
+**v5.6.7**: 4724 Bytes  
+**v5.6.8**: 4724 Bytes  

scripts/size-estimator.js

@@ -2,10 +2,11 @@
 const { execSync }  = require('child_process')
 const packageJson = require('../package.json')
 
+let packageVersion = packageJson.version
 // we estimate redux size based on the content length of the minified umd build hosted by unpkg. This script is brittle but works.
 let reduxSize = execSync("curl -sIL https://unpkg.com/redux/dist/redux.min.js | grep -i Content-Length | tail -1 | awk '{print $2}'").toString()
 // we need to substract redux size from our umd build to get an estimate of our first party code size
 let persistSize = execSync("wc -c < dist/redux-persist.min.js") - reduxSize
 
-let packageVersion = packageJson.version
-console.log(`v${packageVersion}: ${persistSize} Bytes`)
+// note: markdown formatted for conveinence when appending to LIBSIZE.md
+console.log(`**v${packageVersion}**: ${persistSize} Bytes  `)