Replace promise term with future

src/Driver/Http2Driver.php

@@ -1086,7 +1086,7 @@ function (int $bodySize) use ($streamId) {
  );
  } catch (InvalidHeaderException $exception) {
  throw new Http2StreamException(
- "Invalid headers field in promises trailers",
+ "Invalid headers field in trailers",
  $streamId,
  Http2Parser::PROTOCOL_ERROR,
  $exception

src/Trailers.php

@@ -38,7 +38,7 @@ final class Trailers
  /**
  * @param Future<string[]|string[][]> $future Resolved with the trailer values.
  * @param string[] $fields Expected header fields. May be empty, but if provided, the array of
- * headers used to resolve the given promise must contain exactly the fields given in this array.
+ * headers used to complete the given future must contain exactly the fields given in this array.
  *
  * @throws InvalidHeaderException If the fields list contains a disallowed field.
  */

test/Driver/Http1DriverTest.php

@@ -926,7 +926,7 @@ public function provideWriteResponses(): array
  ],
  ];
 
- delay(0.1); // Tick event loop to resolve the Trailers promise.
+ delay(0.1); // Tick event loop to complete the Trailers future.
 
  return $data;
  }

test/TrailersTest.php

@@ -11,9 +11,9 @@ class TrailersTest extends AsyncTestCase
 {
  public function testMessageHasHeader(): void
  {
- $promise = Future::complete(['fooHeader' => 'barValue']);
+ $future = Future::complete(['fooHeader' => 'barValue']);
 
- $trailers = new Trailers($promise, ['fooHeader']);
+ $trailers = new Trailers($future, ['fooHeader']);
  $trailers = $trailers->await();
 
  self::assertTrue($trailers->hasHeader('fooHeader'));
@@ -22,12 +22,12 @@ public function testMessageHasHeader(): void
 
  public function testHasHeaderReturnsFalseForEmptyArrayValue(): void
  {
- $promise = Future::complete(['fooHeader' => []]);
+ $future = Future::complete(['fooHeader' => []]);
 
  $this->expectException(InvalidHeaderException::class);
  $this->expectExceptionMessage('Trailers do not contain the expected fields');
 
- $trailers = new Trailers($promise, ['fooHeader']);
+ $trailers = new Trailers($future, ['fooHeader']);
  self::assertFalse(($trailers->await())->hasHeader('fooHeader'));
  }
 
@@ -39,7 +39,7 @@ public function testDisallowedFieldsInConstructor(): void
  $trailers = new Trailers(Future::complete(null), ['content-length']);
  }
 
- public function testDisallowedFieldsInPromiseResolution(): void
+ public function testDisallowedFieldsInFuture(): void
  {
  $this->expectException(InvalidHeaderException::class);
  $this->expectExceptionMessage("Field 'content-length' is not allowed in trailers");