use minimum versions for provider pinning (#25)

Author: woz5999

README.md

@@ -101,15 +101,15 @@ Available targets:
 
 | Name | Version |
 |------|---------|
-| terraform | >= 0.12.0, < 0.14.0 |
-| aws | ~> 2.0 |
-| local | ~> 1.2 |
+| terraform | >= 0.12.0 |
+| aws | >= 2.0 |
+| local | >= 1.2 |
 
 ## Providers
 
 | Name | Version |
 |------|---------|
-| aws | ~> 2.0 |
+| aws | >= 2.0 |
 
 ## Inputs
 

docs/terraform.md

@@ -3,15 +3,15 @@
 
 | Name | Version |
 |------|---------|
-| terraform | >= 0.12.0, < 0.14.0 |
-| aws | ~> 2.0 |
-| local | ~> 1.2 |
+| terraform | >= 0.12.0 |
+| aws | >= 2.0 |
+| local | >= 1.2 |
 
 ## Providers
 
 | Name | Version |
 |------|---------|
-| aws | ~> 2.0 |
+| aws | >= 2.0 |
 
 ## Inputs
 

versions.tf

@@ -1,8 +1,8 @@
 terraform {
-  required_version = ">= 0.12.0, < 0.14.0"
+  required_version = ">= 0.12.0"
 
   required_providers {
-    aws   = "~> 2.0"
-    local = "~> 1.2"
+    aws   = ">= 2.0"
+    local = ">= 1.2"
   }
 }