drop hhvm support as its no longer working

.travis.yml

@@ -26,8 +26,6 @@ matrix:
  include:
  - php: 5.4
  env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest" COVERAGE=true TEST_COMMAND="composer test-ci"
- - php: hhvm
- dist: trusty
 
 before_install:
  - if [[ $COVERAGE != true ]]; then phpenv config-rm xdebug.ini || true; fi

composer.json

@@ -11,7 +11,7 @@
  }
  ],
  "require": {
- "php": ">=5.4",
+ "php": "^5.4 || ^7.0",
  "psr/http-message": "^1.0",
  "php-http/message-factory": "^1.0.2",
  "clue/stream-filter": "^1.4"

spec/Encoding/ChunkStreamSpec.php

@@ -12,10 +12,6 @@ class ChunkStreamSpec extends ObjectBehavior
 
  function let(StreamInterface $stream)
  {
- if (defined('HHVM_VERSION')) {
- throw new SkippingException('Skipping test as there is no dechunk filter on hhvm');
- }
-
  $this->beConstructedWith($stream);
  }
 

spec/Encoding/CompressStreamSpec.php

@@ -12,10 +12,6 @@ class CompressStreamSpec extends ObjectBehavior
 
  function let(StreamInterface $stream)
  {
- if (defined('HHVM_VERSION')) {
- throw new SkippingException('Skipping test as zlib is not working on hhvm');
- }
-
  $this->beConstructedWith($stream);
  }
 

spec/Encoding/DechunkStreamSpec.php

@@ -12,10 +12,6 @@ class DechunkStreamSpec extends ObjectBehavior
 
  function let(StreamInterface $stream)
  {
- if (defined('HHVM_VERSION')) {
- throw new SkippingException('Skipping test as there is no dechunk filter on hhvm');
- }
-
  $this->beConstructedWith($stream);
  }
 

spec/Encoding/DecompressStreamSpec.php

@@ -12,10 +12,6 @@ class DecompressStreamSpec extends ObjectBehavior
 
  function let(StreamInterface $stream)
  {
- if (defined('HHVM_VERSION')) {
- throw new SkippingException('Skipping test as zlib is not working on hhvm');
- }
-
  $this->beConstructedWith($stream);
  }
 

spec/Encoding/GzipDecodeStreamSpec.php

@@ -12,10 +12,6 @@ class GzipDecodeStreamSpec extends ObjectBehavior
 
  function let(StreamInterface $stream)
  {
- if (defined('HHVM_VERSION')) {
- throw new SkippingException('Skipping test as zlib is not working on hhvm');
- }
-
  $this->beConstructedWith($stream);
  }
 

spec/Encoding/GzipEncodeStreamSpec.php

@@ -12,10 +12,6 @@ class GzipEncodeStreamSpec extends ObjectBehavior
 
  function let(StreamInterface $stream)
  {
- if (defined('HHVM_VERSION')) {
- throw new SkippingException('Skipping test as zlib is not working on hhvm');
- }
-
  $this->beConstructedWith($stream);
  }