Update brew formula to 2.5.0 (#1144)

* Update brew formula to 2.5.0

* Can use `idna` 3.2

* Sort requirements to ease reproductible builds

And also to have the same output as `brew bump-formula-pr`.

* Sync `bottles` with official Formula

And keep the `high_sierra` one.

* Add a workflow to check the Formula

.github/workflows/packaging_mac_check_formula.yml

@@ -0,0 +1,18 @@
+name: Check Brew Formula
+
+on:
+  pull_request:
+    paths:
+      - extras/httpie.rb
+
+jobs:
+  check-formula:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Brew
+        run: |
+          brew developer on
+          brew update
+      - name: Build and test the Formula
+        run: make brew-test