Fluent Binder for Query/Path/Form binding (#1717) (#1736)

* Fluent Binder for Query/Path/Form binding.
* CI: report coverage for latest go (1.15) version
* improve docs, remove uncommented code
* separate unixtime with sec and nanosec precision binding

.github/workflows/echo.yml

@@ -59,7 +59,7 @@ jobs:
           go test -race --coverprofile=coverage.coverprofile --covermode=atomic ./...
 
       - name: Upload coverage to Codecov
-        if: success() && matrix.go == 1.13 && matrix.os == 'ubuntu-latest'
+        if: success() && matrix.go == 1.15 && matrix.os == 'ubuntu-latest'
         uses: codecov/codecov-action@v1
         with:
           token:

Makefile

@@ -23,5 +23,12 @@ test: ## Run tests
 race: ## Run tests with data race detector
 	@go test -race ${PKG_LIST}
 
+benchmark: ## Run benchmarks
+	@go test -run="-" -bench=".*" ${PKG_LIST}
+
 help: ## Display this help screen
 	@grep -h -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'
+
+goversion ?= "1.12"
+test_version: ## Run tests inside Docker with given version (defaults to 1.12 oldest supported). Example: make test_version goversion=1.13
+	@docker run --rm -it -v $(shell pwd):/project golang:$(goversion) /bin/sh -c "cd /project && make check"