Fix tests for URI encoding

Tests used and old function name and kept passing in the same vim
session since rereading an autoload script does not drop removed
function definitions.

test/uri_test.vim

@@ -1,11 +1,11 @@
 function! TestUriEncode() abort
-  call assert_equal('foo/bar%20baz', lsc#uri#encodeFilePath('foo/bar baz'))
-  call assert_equal('foo/bar%23baz', lsc#uri#encodeFilePath('foo/bar#baz'))
+  call assert_equal('file://foo/bar%20baz', lsc#uri#documentUri('foo/bar baz'))
+  call assert_equal('file://foo/bar%23baz', lsc#uri#documentUri('foo/bar#baz'))
 endfunction
 
 function! TestUriDecode() abort
-  call assert_equal('foo/bar baz', lsc#uri#decodeFilePath('foo/bar%20baz'))
-  call assert_equal('foo/bar#baz', lsc#uri#decodeFilePath('foo/bar%23baz'))
+  call assert_equal('foo/bar baz', lsc#uri#documentPath('file://foo/bar%20baz'))
+  call assert_equal('foo/bar#baz', lsc#uri#documentPath('file://foo/bar%23baz'))
 endfunction
 
 function! s:RunTest(test)