Add workspace symbol support

Author: gatesn

appveyor.yml

@@ -16,10 +16,10 @@ init:
 
 install:
   - 'appveyor DownloadFile "https://github.com/universal-ctags/ctags-win32/releases/download/2018-03-13/5010e849/ctags-2018-03-13_5010e849-x64.zip" -FileName ctags.zip'
-  - "7z e ctags.zip -o C:\\Users\\appveyor\\bin ctags.exe"
-  - "set PATH=%PATH%;C:\\Users\\appveyor\\bin"
-  - "%PYTHON%/python.exe -m pip install --upgrade pip setuptools"
-  - "%PYTHON%/python.exe -m pip install .[all] .[test]"
+  - '7z e ctags.zip -o "C:\Users\appveyor\bin" ctags.exe'
+  - 'set PATH=%PATH%;C:\Users\appveyor\bin'
+  - '%PYTHON%/python.exe -m pip install --upgrade pip setuptools'
+  - '%PYTHON%/python.exe -m pip install .[all] .[test]'
 
 test_script:
   - "%PYTHON%/Scripts/pytest.exe test/"