fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-ANSIREGEX-1583908
- https://snyk.io/vuln/SNYK-JS-MINIMATCH-3050818

package.json

@@ -60,7 +60,7 @@
     "focus-trap": "2.4.5",
     "fs-admin": "^0.1.7",
     "fs-plus": "^3.1.1",
-    "fstream": "0.1.24",
+    "fstream": "1.0.12",
     "fuzzaldrin": "^2.1",
     "fuzzy-finder": "https://www.atom.io/api/packages/fuzzy-finder/versions/1.13.7/tarball",
     "git-diff": "file:packages/git-diff",
@@ -157,7 +157,7 @@
     "temp": "^0.9.0",
     "text-buffer": "13.16.1",
     "timecop": "https://www.atom.io/api/packages/timecop/versions/0.36.2/tarball",
-    "tree-sitter": "0.15.0",
+    "tree-sitter": "0.20.3",
     "tree-sitter-css": "^0.13.7",
     "tree-view": "https://www.atom.io/api/packages/tree-view/versions/0.228.0/tarball",
     "typescript-simple": "1.0.0",