"Remove" option doesn't remove dependency

[jolly-fellow]

Content of the project.yaml file:

#antler-proj::generated
#   This file was AUTOGENERATED.
#   Modification or removal of the above lines will cause antler-proj to deem the project as invalid.
#   Any changes made to this file will be lost when the tool updates this project.
#   generated with v1.0.0
#
# This file was auto-generated. Be aware antler-proj may discard added comments.


project: test_proj
version: 0.0.1
libraries:
  - name: test_app1
    lang: CXX
    compile_options: cmpl_opt;
    link_options: link_opt;
apps:
  - name: app
    lang: CXX
  - name: test_app
    lang: java
    compile_options: cpp_opt;
    link_options: link_pot;
  - name: test_app1
    lang: java
    compile_options: cpp_opt;
    link_options: link_pot;
    depends:
      - name: test_dep1
        from: 'https://github.com/larryk85/sample_contract'
        release: 0.0.1
        hash: hash

root@c1742fb0fdb3:/app# antler-proj remove /host/home/alex/dev/projects/AntelopeIO/Clion_DUNE/test dep test_app1 test_dep1
Object: test_dep1 does not exist.

while removing of the test_app1 with it's dependency works well:

root@c1742fb0fdb3:/app# antler-proj remove /host/home/alex/dev/projects/AntelopeIO/Clion_DUNE/test app test_app1
Removing object: test_app1 from the project.

P.S. IMHO it would be better to write the message as "Object test_app1 has been removed" or something like this to make the user sure that the action has been completed successfully.

[mikelik]

To answer the original issue: the syntax is as following:
antler-proj remove dep [OPTIONS] dep [obj]
which means that original command needs to have dep and obj swapped. It should be:
antler-proj remove /host/home/alex/dev/projects/AntelopeIO/Clion_DUNE/test dep test_dep1 test_app1

However there are other issues related which I will address in the PR:

1. Nothing happens if directory doesn't exist, example command:
   antler-proj remove /not/existing/dir dep test_dep1 test_app1
   Expected: some error that directory doesn't exist
   NOTE: this issue will be solved seperately in If a directory doesn't exist, nothing happens when remove command is used #39
2. If you run proper command for above project.yml
   antler-proj remove /host/home/alex/dev/projects/AntelopeIO/Clion_DUNE/test dep test_dep1 test_app1
   what happens is that from section in project.yml is being deleted for app test_app1.
   Expectation is that it shouldn't be (because command affect only dependency test_dep1, not the whole app `test_app1)
3. Section libraries is gone after issuing above command.
4. Lang for app test_app1 changes from java to C after issuing above comand.
5. I cannot add dependency:

mikel@msi:~/repo/antler-proj/build/tools$ ./antler-proj add dep test_app abc_dep "https://github.com/abc/a"
[debug_log] :: version.hpp:parse:112 :: parsing version : 0.0.1
[error_log] :: location.cpp:is_reachable:37 :: In this version of antler-proj only github shorthands are supported. Generalized git repos and archives will be supported in a future version.
[error_log] :: project.cpp:validate_dependency:121 :: Error denpendency: abc_dep is invalid.
[error_log] :: add_to.hpp:add_dependency<antler::project::object<antler::project::app_tag> >:115 :: Dependency: abc_dep is invalid.
[error_log] :: add_to.hpp:exec:185 :: failed to add dependency

[mikelik]

Issue 1 pulled out to #39
Issue 2, 3, 4 are caused by improper project.yml. Now when you create a new project.yml from scratch there is location instead of from, libs instead of libraries and you can't add dependency other than C++. So there is nothing to fix.
Issue 5 happened because of incorrect URL, I have improved the error here: #42