docs(readme): update requirements to mention M1-based macs

As of build-emacs-for-macos v0.6.8, the emacs-builder tool supports
handling stable Emacs release differently, so we can easily separate
them from the regular nightly builds.

.github/workflows/build.yml

@@ -40,7 +40,7 @@ jobs:
         uses: actions/checkout@v2
         with:
           repository: jimeh/build-emacs-for-macos
-          ref: "v0.6.2"
+          ref: "v0.6.9"
           path: builder
       - uses: actions/setup-go@v2
         with:
@@ -96,7 +96,7 @@ jobs:
         uses: actions/checkout@v2
         with:
           repository: jimeh/build-emacs-for-macos
-          ref: "v0.6.2"
+          ref: "v0.6.9"
           path: builder
       - uses: ruby/setup-ruby@v1
         with:
@@ -192,9 +192,14 @@ jobs:
         with:
           name: dmg
           path: builds
-      - name: Publish disk image to GitHub Release
+      - name: Publish disk image to a GitHub Release
         run: >-
           bin/emacs-builder -l debug release --plan build-plan.yml publish
           ${{ github.event.inputs.extraReleaseArgs }}
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: Trigger update casks workflow in homebrew tap
+        run: >-
+          gh workflow run --repo jimeh/homebrew-emacs-builds update-casks.yml
+        env:
+          GITHUB_TOKEN: ${{ secrets.TAP_REPO_TOKEN }}

.github/workflows/dispatch-cask-update.yml

@@ -1,15 +0,0 @@
----
-name: Dispatch Cask Update
-on:
-  release:
-    types: [published]
-
-jobs:
-  dispatch-cask-update:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Run update formulas workflow in jimeh/homebrew-emacs-builds
-        run: >-
-          gh workflow run --repo jimeh/homebrew-emacs-builds update-formulas.yml
-        env:
-          GITHUB_TOKEN: ${{ secrets.TAP_REPO_TOKEN }}

README.md

@@ -8,13 +8,20 @@
 
 <p align="center">
   <a href="https://github.com/jimeh/emacs-builds/releases/latest">
-    <img alt="GitHub release (latest)" src="https://img.shields.io/github/v/release/jimeh/emacs-builds?style=flat&label=nightly&color=%237F5AB6&logo=GNU%20Emacs&logoColor=white">
+    <img alt="GitHub release (stable)" src="https://img.shields.io/endpoint?url=https%3A%2F%2Fraw.githubusercontent.com%2Fjimeh%2Fhomebrew-emacs-builds%2Fmeta%2FCasks%2Femacs-app%2Fshield.json">
   </a>
+  <a href="https://github.com/jimeh/emacs-builds/releases">
+    <img alt="GitHub release (nightly)" src="https://img.shields.io/endpoint?url=https%3A%2F%2Fraw.githubusercontent.com%2Fjimeh%2Fhomebrew-emacs-builds%2Fmeta%2FCasks%2Femacs-app-nightly%2Fshield.json">
+  </a>
+  <a href="https://github.com/jimeh/emacs-builds/issues/7">
+    <img alt="GitHub release (known good nightly)" src="https://img.shields.io/endpoint?url=https%3A%2F%2Fraw.githubusercontent.com%2Fjimeh%2Fhomebrew-emacs-builds%2Fmeta%2FCasks%2Femacs-app-good%2Fshield.json">
+  </a>
+  <br />
   <a href="https://github.com/jimeh/emacs-builds/issues">
-    <img alt="GitHub issues" src="https://img.shields.io/github/issues-raw/jimeh/emacs-builds?style=flat&logo=github&colorColor=white">
+    <img alt="GitHub issues" src="https://img.shields.io/github/issues-raw/jimeh/emacs-builds?style=flat&logo=github&logoColor=white">
   </a>
   <a href="https://github.com/jimeh/emacs-builds/pulls">
-    <img alt="GitHub pull requests" src="https://img.shields.io/github/issues-pr-raw/jimeh/emacs-builds?style=flat&logo=github&colorColor=white">
+    <img alt="GitHub pull requests" src="https://img.shields.io/github/issues-pr-raw/jimeh/emacs-builds?style=flat&logo=github&logoColor=white">
   </a>
   <a href="https://github.com/jimeh/emacs-builds/releases">
     <img alt="GitHub all releases" src="https://img.shields.io/github/downloads/jimeh/emacs-builds/total?style=flat&logoColor=white&logo=data%3Aimage%2Fpng%3Bbase64,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%2FPnP7qIwAAAGBaUNDUHNSR0IgSUVDNjE5NjYtMi4xAAAokXWRzytEURTHP2aIGBEWFhaThtWM%2FKiJjTLSUJM0RhlsZp55M2rezOu9N2myVbaKEhu%2FFvwFbJW1UkRKdsqa2KDnPKNGMud27vnc773ndO%2B54IplFc2s7gUtZxnRcMg7G5%2Fz1j5SQwvQzEBCMfWRqakIFe3thionXgWcWpXP%2FWsNiylTgao64WFFNyzhceHIsqU7vCncpmQSi8LHwn5DLih87ejJEj85nC7xh8NGLDoKrmZhb%2FoXJ3%2BxkjE0YXk5Pi1bUH7u47zEk8rNTEvsFO%2FAJEqYEF4mGGOUIH0MyRwkQD89sqJCfu93%2FiR5yVVk1ilisESaDBZ%2BUQtSPSVRFT0lI0vR6f%2FfvprqQH%2BpuicENQ%2B2%2FdIFtRvwuW7b7%2Fu2%2FXkA7ns4y5Xz83sw%2BCr6elnz7ULTKpycl7XkFpyuQfudnjAS35Jb3KWq8HwEjXFovYT6%2BVLPfvY5vIXYinzVBWzvQLecb1r4AjtZZ9JRQIRfAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAhUlEQVQokb3QsQnDMBRF0Y9J6QGylCt7GI%2BRPdJ4BIMXyA4pM0KKk0YCYawogZAHH4Tuvw%2BhiEowY67xarBirfHu68afijjXFvesK8AQEXeMB9KU2HDU2GPDE2P%2BHEzpbkNfe04pP9K8lw7knLa0k69pPpP%2BFyzaWfL%2BqXAvEXFr9K%2F58AJFIbDLRt48DAAAAABJRU5ErkJggg%3D%3D&color=blue&label=total%20downloads">
@@ -23,15 +30,15 @@
 
 <p align="center">
   <strong>
-    Nightly binary builds of Emacs for macOS as a self-contained Emacs.app,
-    with native-compilation.
+    Self-contained Emacs.app builds for macOS, with native-compilation support
+    in nightly builds.
   </strong>
 </p>
 
 ## Features
 
 - Self-contained Emacs.app application bundle, with no external dependencies.
-- Native-compilation ([gccemacs][]).
+- Native-compilation ([gccemacs][]), nightly builds only.
 - Native JSON parsing via libjansson.
 - SVG rendering via librsvg.
 - Various image formats are supported via macOS native image APIs.
@@ -59,13 +66,16 @@
 
 ## System Requirements
 
-- Intel-based Mac running macOS 10.15.x or later.
+- macOS 10.15.x or later (uses Rosetta2 on M1-based macs).
+- Homebrew `gcc` formula (nightly builds only).
+- Xcode Command Line Tools (nightly builds only).
 
 ## Installation
 
 ### Manual Download
 
-See the [Releases][] page to download latest builds.
+See the [Releases][] page to download latest builds, or [here](latest) for the
+latest stable release.
 
 Nightly builds of Emacs are for the part just fine, but if you don't like living
 too close to the edge, see issue [#7 Known Good Nightly Builds][7] for a list of
@@ -73,11 +83,14 @@ recent nightly builds which have been actively used by a living being without
 any issues.
 
 [releases]: https://github.com/jimeh/emacs-builds/releases
+[latest]: https://github.com/jimeh/emacs-builds/releases/latest
 [7]: https://github.com/jimeh/emacs-builds/issues/7
 
 ### Homebrew Cask
 
-1. Install the `jimeh/emacs-builds` Homebrew tap:
+1. Install the
+   [`jimeh/emacs-builds`](https://github.com/jimeh/homebrew-emacs-builds)
+   Homebrew tap:
    ```
    brew tap jimeh/emacs-builds
    ```
@@ -90,6 +103,11 @@ any issues.
      ```
      brew install --cask emacs-app-good
      ```
+   - `emacs-app` for the latest stable release of Emacs (does not include
+     native-comp at time of writing):
+     ```
+     brew install --cask emacs-app
+     ```
 
 [7]: https://github.com/jimeh/emacs-builds/issues/7