Add stretchr/testify & update min version to go1.19 #316

# to view logs

	on:
	push:
	branches:
	- master
	- main
	paths:
	- 'azureblob/**'
	pull_request:
	paths:
	- 'azureblob/**'
	name: "Tests Azure Blob"
	jobs:
	Tests:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	go-version:
	- 1.18.x
	- 1.19.x
	- 1.20.x
	steps:
	- name: Install Azurite
	run: \|
	docker run -d -p 10000:10000 mcr.microsoft.com/azure-storage/azurite azurite-blob --blobHost 0.0.0.0 --blobPort 10000
	- name: Fetch Repository
	uses: actions/checkout@v3
	- name: Install Go
	uses: actions/setup-go@v4
	with:
	go-version: '${{ matrix.go-version }}'
	- name: Run Test
	run: cd ./azureblob && go test ./... -v -race

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