add Dangerfile

Dangerfile

@@ -0,0 +1,14 @@
+# Make it more obvious that a PR is a work in progress and shouldn't be merged yet
+warn("PR is classed as Work in Progress") if github.pr_title.include? "[WIP]"
+
+# Warn when there is a big PR
+warn("Big PR") if git.lines_of_code > 500
+
+# Don't let testing shortcuts get into master by accident
+fail("fdescribe left in tests") if `grep -r fdescribe specs/ `.length > 1
+fail("fit left in tests") if `grep -r fit specs/ `.length > 1
+
+# Flutter lint
+flutter_lint.only_modified_files = true
+flutter_lint.report_path = "flutter_analyze_report.txt"
+flutter_lint.lint