Fix cli builds

    - Removed sqlite3 support from binaries
        - It was never working anyways: mattes/migrate#244
    - Don't use cgo as is requires a cross-compiler to build for other platforms
        - cgo was originally added for this reason: mattes/migrate#238 (comment)

Author: dhui

Makefile

@@ -1,5 +1,5 @@
 SOURCE ?= file go-bindata github aws-s3 google-cloud-storage
-DATABASE ?= postgres mysql redshift cassandra sqlite3 spanner cockroachdb clickhouse
+DATABASE ?= postgres mysql redshift cassandra spanner cockroachdb clickhouse
 VERSION ?= $(shell git describe --tags 2>/dev/null | cut -c 2-)
 TEST_FLAGS ?=
 REPO_OWNER ?= $(shell cd .. && basename "$$(pwd)")
@@ -8,9 +8,9 @@ COVERAGE_DIR ?= .coverage
 
 build-cli: clean
 	-mkdir ./cli/build
-	cd ./cli && CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -a -o build/migrate.linux-amd64 -ldflags='-X main.Version=$(VERSION)' -tags '$(DATABASE) $(SOURCE)' .
-	cd ./cli && CGO_ENABLED=1 GOOS=darwin GOARCH=amd64 go build -a -o build/migrate.darwin-amd64 -ldflags='-X main.Version=$(VERSION)' -tags '$(DATABASE) $(SOURCE)' .
-	cd ./cli && CGO_ENABLED=1 GOOS=windows GOARCH=amd64 go build -a -o build/migrate.windows-amd64.exe -ldflags='-X main.Version=$(VERSION)' -tags '$(DATABASE) $(SOURCE)' .
+	cd ./cli && GOOS=linux GOARCH=amd64 go build -a -o build/migrate.linux-amd64 -ldflags='-X main.Version=$(VERSION)' -tags '$(DATABASE) $(SOURCE)' .
+	cd ./cli && GOOS=darwin GOARCH=amd64 go build -a -o build/migrate.darwin-amd64 -ldflags='-X main.Version=$(VERSION)' -tags '$(DATABASE) $(SOURCE)' .
+	cd ./cli && GOOS=windows GOARCH=amd64 go build -a -o build/migrate.windows-amd64.exe -ldflags='-X main.Version=$(VERSION)' -tags '$(DATABASE) $(SOURCE)' .
 	cd ./cli/build && find . -name 'migrate*' | xargs -I{} tar czf {}.tar.gz {}
 	cd ./cli/build && shasum -a 256 * > sha256sum.txt
 	cat ./cli/build/sha256sum.txt