Add .editorconfig and fix code style

.editorconfig

@@ -0,0 +1,8 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+indent_style = spaces
+charset = utf-8

lib/GzipInputStream.php

@@ -53,4 +53,4 @@ class GzipInputStream implements InputStream {
 
         $this->source->close();
     }
-}
+}

lib/Parser.php

@@ -143,4 +143,4 @@ class Parser implements OutputStream {
     public function close() {
         $this->generator = null;
     }
-}
+}

lib/PendingReadException.php

@@ -1,6 +1,7 @@
 <?php
 
 namespace Amp\ByteStream;
+
 use Throwable;
 
 /**
@@ -14,4 +15,4 @@ class PendingReadException extends StreamException {
     ) {
         parent::__construct($message, $code, $previous);
     }
-}
+}

lib/ResourceInputStream.php

@@ -136,4 +136,4 @@ class ResourceInputStream implements InputStream {
             $this->close();
         }
     }
-}
+}

lib/functions.php

@@ -29,4 +29,4 @@ function pipe(InputStream $source, OutputStream $destination): Promise {
 
         return $written;
     });
-}
+}