Add missing docs and upgrade dependencies

.gitignore

@@ -1,16 +1,56 @@
-# dotenv
-.env
+## sbt
+logs
+target
+/.idea
+/.idea_modules
+/.classpath
+/.gradle
+/.project
+/.gradle
+/.settings
+/public/*
 
-# virtualenv
-venv/
-ENV/
+# sbt specific
+.cache
+.history
+.lib/
+.bsp/
+dist/*
+lib_managed/
+src_managed/
+project/boot/
 
-# Rope project settings
+# Scala-IDE specific
+.scala_dependencies
+.worksheet
 .ropeproject
 .idea
+
+# Temporary
+.netrwhist
+*~
+
+# Vim specific ---
+# Swap
+[._]*.s[a-v][a-z]
+[._]*.sw[a-p]
+[._]s[a-v][a-z]
+[._]sw[a-p]
+._*
+*.swp
+*.swo
+
+# System Files
 .DS_Store
+Thumbs.db%
 
+## Metals
+.metals
+.bloop
 
-# sbt specific
-target/
-project/target
+# dotenv
+.env
+
+# virtualenv
+venv/
+ENV/

.scalafmt.conf

@@ -0,0 +1,13 @@
+version = "3.0.6"
+
+runner.dialect = scala213source3
+align.preset = more
+style = defaultWithAlign
+maxColumn = 115
+docstrings.style = SpaceAsterisk
+docstrings.removeEmpty = true
+continuationIndent.callSite = 2
+continuationIndent.defnSite = 4
+includeCurlyBraceInSelectChains = false
+project.git = true
+project.excludeFilters = ["target/"]

.travis.yml

@@ -2,9 +2,9 @@
 os: linux
 dist: xenial
 language: scala
-scala: 2.13.3
+scala:
+  - 2.13.6
 jdk:
-  - openjdk8
-  # - openjdk11  # Fails!
+  - openjdk11
   # - openjdk14  # Fails!
   # - openjdk15  # Fails!

CONTRIBUTING.md

@@ -0,0 +1,62 @@
+## How to contribute?
+
+#### Did you find a bug?
+
+* **Ensure the bug was not already reported** by searching on GitHub
+  under [Project Issues](https://github.com/TheAlgorithms/Scala/issues).
+* Please avoid opening issues asking to be "assigned" to a particular algorithm. This merely creates unnecessary noise
+  for maintainers. Instead, please submit your implementation in a pull request, and it will be evaluated by project
+  maintainers.
+* If you are unable to find an open issue referring to the same problem, depending on the type of issue follow the
+  appropriate steps:
+
+#### Do you want to contribute to the documentation?
+
+- Please read the documentation in
+  here [Contributing to the Documentation](https://github.com/TheAlgorithms/Scala/blob/master/CONTRIBUTING.md),
+  [open a new one issue](https://github.com/TheAlgorithms/Scala/issues/new), make changes and then create a pull
+  request, it will be put under review and accepted if it is appropriate.
+
+#### Do you want to add a new feature?
+
+* [Open a new one issue](https://github.com/TheAlgorithms/Scala/issues/new). Be sure to include a **title and a clear
+  description** and a **test case** demonstrating the new feature that you want to add to the project.
+
+##### Contributing to Algorithms (Make sure to check all the points below before opening a PR)
+
+* Make sure you follow proper coding standards and naming conventions.
+    * Please
+      use [Binary Search Implementation](https://github.com/TheAlgorithms/Scala/blob/master/src/main/scala/Search/BinarySearch.scala)
+    *
+  and [Binary Search Test](https://github.com/TheAlgorithms/Scala/blob/master/src/test/scala/Search/BinarySearchSpec.scala)
+  as a reference.
+* Add the algorithm implementation as an object and not as a class
+* Add proper comments about the algorithm implementation and the functions present in the algorithm
+* Add a test spec in the test folder under the same domain as that of your algorithm. **PRs without a test spec would
+  not be accepted!**
+* Add at least 1 positive and 1 negative test in the test spec
+* Raise a PR for the algorithm object file and the test spec
+* [How to write a test case in Scala](http://www.scalatest.org/user_guide/writing_your_first_test)
+
+#### Contributing to Tests
+
+* You can contribute tests for a specific algorithm
+* Add as many tests as you can and try to cover all the borderline test cases
+* Open a PR with for your testSpec
+* Make sure you are not adding redundant test cases
+* If you see that the algorithm fails for a particular test case, then open an issue with proper explanation.
+* [How to write a test case in Scala](http://www.scalatest.org/user_guide/writing_your_first_test)
+
+#### Do you want to fix a bug?
+
+* [Open a new issue](https://github.com/TheAlgorithms/Scala/issues/new).Be sure to include a **title and a clear
+  description** and a **test case** demonstrating the expected behaviour that is not occurring.
+
+#### **Do you have questions about the source code?**
+
+* Ask any question about how to use the repository in
+  the [TheAlgorithms room in GITTER](https://gitter.im/TheAlgorithms/community?source=orgpage#) or
+  [open a new one issue](https://github.com/TheAlgorithms/Scala/issues/new)
+
+:+1::tada: That's all you need to know about the process now it's your turn to help us improve the repository, thank you
+again! :+1::tada: