Add Justfile

Justfile

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+
+# git tasks to start next development version
+prepare-dev-version v:
+    git checkout trunk
+    gsed -zE -i 's/(name = "bigdecimal"\nversion )= [^\n]*/\1= "{{v}}+dev"/' Cargo.toml Cargo.lock
+    git add Cargo.toml Cargo.lock
+    git commit -m 'Begin v{{v}} development'
+
+
+# git tasks to run to merge trunk into master
+prepare-release v:
+    git checkout trunk
+    cargo clippy
+    gsed -zE -i 's/(name = "bigdecimal"\nversion )= [^\n]*/\1= "{{v}}"/' Cargo.toml Cargo.lock
+    git add Cargo.toml Cargo.lock
+    git commit -m 'Version {{v}}'
+    git checkout master
+    git merge trunk --no-ff -m 'v{{v}}'
+    # git tag 'v{{v}}'
+