Explicitly cast integer to string

Author: sebastianbergmann

src/Report/Html/Renderer.php

@@ -171,8 +171,8 @@ protected function setCommonTemplateVariables(Template $template, AbstractNode $
                 'version'          => $this->version,
                 'runtime'          => $this->runtimeString(),
                 'generator'        => $this->generator,
-                'low_upper_bound'  => $this->thresholds->lowUpperBound(),
-                'high_lower_bound' => $this->thresholds->highLowerBound(),
+                'low_upper_bound'  => (string) $this->thresholds->lowUpperBound(),
+                'high_lower_bound' => (string) $this->thresholds->highLowerBound(),
             ],
         );
     }

src/Report/Html/Renderer/File.php

@@ -965,7 +965,7 @@ private function renderLine(Template $template, int $lineNumber, string $lineCon
     {
         $template->setVar(
             [
-                'lineNumber'  => $lineNumber,
+                'lineNumber'  => (string) $lineNumber,
                 'lineContent' => $lineContent,
                 'class'       => $class,
                 'popover'     => $popover,