Fix newly reported PHPStan issues

Author: swissspidy

composer.json

@@ -13,7 +13,7 @@
     ],
     "require": {
         "php": ">=7.2",
-        "wp-cli/wp-cli": "^2",
+        "wp-cli/wp-cli": "^2.13",
         "inmarelibero/gitignore-checker": "^1.0.4"
     },
     "require-dev": {

src/Dist_Archive_Command.php

@@ -576,6 +576,12 @@ private function get_size_format( $bytes, $decimals = 0 ) {
 		$size_key = floor( log( $bytes ) / log( 1000 ) );
 		$sizes    = [ 'B', 'KB', 'MB', 'GB', 'TB' ];
 
+		if ( is_infinite( $size_key ) ) {
+			$size_key = 0;
+		}
+
+		$size_key = (int) $size_key;
+
 		$size_format = isset( $sizes[ $size_key ] ) ? $sizes[ $size_key ] : $sizes[0];
 
 		// Display the size as a number.