[vala] Created tag 0.50.1

[Rico Tzschichholz <ricotz src gnome org>]

The signed tag '0.50.1' was created.

Tagger: Rico Tzschichholz <ricotz ubuntu com>
Date: 1601292019 +0200

    0.50.1

Changes since the last tag '0.50.0':

Nick Schrader (2):
      vala: Prioritize the usage of an existing with-variable instance
      vala: Recognize previously inserted implicit access to with-variable

Rico Tzschichholz (18):
      gtk4: Don't skip LayoutManager.create_layout_child()
      gtk4: Update to 3.99.1+9afdb41b
      gtk4: Update to 3.99.1+35c3a60c
      vala: Improve parsing of with-statement and allow it as embedded statement
      parser: Allow to begin expression with statement keyword
      gtk4: Update to 3.99.1+ee75bae8
      webkit2gtk-4.0: Update to 2.30.1
      codegen: Don't falsly use g_return_val_if_fail() for async creation method
      codegen: Don't pass CCodeFunctionCall to NULL-aware free macro
      testrunner: Pass --enable-checking to increase coverage
      build: Stop passing obsolete --use-header
      testrunner: Filter external -0X flags to preserve current default -O0
      gtk4: Update to 3.99.1+15b635d7
      gstreamer: Update from 1.19.0+ git master
      vapi: Update GIR-based bindings
      g-i: Fix a couple of C compiler warnings
      libvaladoc: Fix a couple of C compiler warnings
      Release 0.50.1