chore!: upgrade to cdktf 0.19.0 (#13)

This PR initiates the upgrade of CDKTF from version `0.18.0` to version
`0.19.0`.
Unfortunately, not everything can be automated, and the following steps
need to be completed manually:
 
- [x] Update `@cdktf/provider-null` to a version compatible with
`cdktf@0.19.0`
[here](https://github.com/cdktf/construct-projen-template/blob/d62067602139725e957e516ef41d94c384af731a/.projenrc.ts#L84).
Look up the version
[here](https://github.com/cdktf/cdktf-provider-null/releases/).
- [x] Run `npx projen`
 
Please checkout this PR, complete the above steps, push the changes to
this branch, and then mark this PR as ready for review to complete the
upgrade. Thanks!

---------

Signed-off-by: team-tf-cdk <github-team-tf-cdk@hashicorp.com>
Co-authored-by: Daniel Schmidt <danielmschmidt92@gmail.com>

.projenrc.ts

@@ -75,14 +75,14 @@ const project = new cdktf.ConstructLibraryCdktf({
   //   moduleName: `github.com/cdktf/${shortName}-go`,
   //   packageName: shortName.replace(/-/g, ""),
   // },
-  cdktfVersion: "^0.18.0",
+  cdktfVersion: "0.19.0",
   jsiiVersion: "^5.1.0",
   minNodeVersion: "18.12.0",
 });
 
 project.addPeerDeps(
-  "cdktf@>=0.18.0",
-  "@cdktf/provider-null@>=8.0.0",
+  "cdktf@>=0.19.0",
+  "@cdktf/provider-null@>=9.0.0",
   "constructs@^10.0.25"
 );
 project.addDevDeps(

README.md

@@ -5,7 +5,7 @@ A projen template for CDKTF constructs authored by HashiCorp (internal use only)
 ## Compatibility
 
 - `node` >= 18.12.0
-- `cdktf` >= 0.18.0
+- `cdktf` >= 0.19.0
 - `constructs` >= 10.0.25
 
 ## How to Use