Standardize emoji.

Partial #713

Signed-off-by: Ross Goldberg <484615+rgoldberg@users.noreply.github.com>

README.md

@@ -308,7 +308,7 @@ If mas doesn't work for you as expected (e.g. you can't install/upgrade apps), r
 If the issue persists, please [file a bug](https://github.com/mas-cli/mas/issues/new).
 All feedback is much appreciated! ✨
 
-## ℹ️ Build from source
+## 🏗 Build from source
 
 You can build from Xcode by opening the root mas directory, or from the Terminal:
 
@@ -318,7 +318,7 @@ script/build
 
 Build output can be found in the `.build` directory within the project.
 
-## ✅ Tests
+## 🧪 Tests
 
 Tests are written using [Quick](https://github.com/Quick/Quick) & [Nimble](https://github.com/Quick/Nimble).
 

script/format

@@ -10,7 +10,7 @@
 
 . "${0:a:h}/_setup_script"
 
-printf $'==> 🚨 Formatting mas %s\n' "$(script/version)"
+printf $'==> 🧹 Formatting mas %s\n' "$(script/version)"
 
 for formatter in markdownlint prettier swift-format swiftformat swiftlint yamllint; do
   if ! command -v "${formatter}" >/dev/null; then

script/test

@@ -8,7 +8,7 @@
 
 . "${0:a:h}/_setup_script"
 
-printf $'==> ✅ Testing mas %s\n' "$(script/version)"
+printf $'==> 🧪 Testing mas %s\n' "$(script/version)"
 
 script/generate_package_swift test