Vendor dependencies

Let's see how I like this workflow.

vendor/users/Justfile

@@ -0,0 +1,36 @@
+all: build test
+all-release: build-release test-release
+
+MIN_RUST := "1.31.0"
+
+
+# compiles the code
+build:
+    cargo +{{MIN_RUST}} build
+    cargo +stable       build
+
+# compiles the code in release mode
+build-release:
+    cargo +{{MIN_RUST}} build --release --verbose
+    cargo +stable       build --release --verbose
+
+# compiles the code with every combination of feature flags
+build-features:
+    cargo +{{MIN_RUST}} hack build --feature-powerset
+    cargo +stable       hack build --feature-powerset
+
+
+# runs unit tests
+test:
+    cargo +{{MIN_RUST}} test --all -- --quiet
+    cargo +stable       test --all -- --quiet
+
+# runs unit tests in release mode
+test-release:
+    cargo +{{MIN_RUST}} test --all --release --verbose
+    cargo +stable       test --all --release --verbose
+
+# runs unit tests with every combination of feature flags
+test-features:
+    cargo +{{MIN_RUST}} hack test --feature-powerset --lib -- --quiet
+    cargo +stable       hack test --feature-powerset --lib -- --quiet