tree-sitter: 1.18.2 -> 0.19.3

Update the grammars and add `allGrammars` derivation.
`nix-build "<nixpkgs>" -A tree-sitter.allGrammars` will create a
derivation with symlinks to all the grammars

pkgs/development/tools/parsing/tree-sitter/grammars/tree-sitter-php.json

@@ -1,9 +1,9 @@
 {
   "url": "https://github.com/tree-sitter/tree-sitter-php",
-  "rev": "b0c0367d4b7058921fdc4ba11e257441a64ab809",
-  "date": "2020-07-29T16:56:25-07:00",
-  "path": "/nix/store/la06yzcv5w1dpp31s4clllkfic8rs98a-tree-sitter-php",
-  "sha256": "0a47rr1d5dg70kfvk257g7mhpcwslv6prxc7012spxcrfiwbx89l",
+  "rev": "ba231f9844e5a1bf60e1cb72c34c0a431239585a",
+  "date": "2021-03-03T17:17:11-08:00",
+  "path": "/nix/store/cn06h14pgq3psjq3ms0yvdm3x1wwbc1j-tree-sitter-php",
+  "sha256": "1xaml64b7cx3hn6x35bbgar8cp7ccxkwvxddjdvyj5nzfx1id8y3",
   "fetchSubmodules": false,
   "deepClone": false,
   "leaveDotGit": false