fairness package install not working with R version 3.6.3

[mjorgen1]

I'm new to R and want to try out the fairness package with some data. I ran the below command and received that long stream of output. After reading through the output, I tried installing the two packages it recommended I download 'libxml2-dev' and 'libcurl4-openssl-dev' but those are not available for my version of R. I'm on an Ubuntu 20.04 machine using R 3.6.3. Is there some incompatibility with R 3.6.3 and the fairness package and its dependencies? Please let me know, thanks!

> install.packages('fairness')
Installing package into ‘/home/mackenzie/R/x86_64-pc-linux-gnu-library/3.6’
(as ‘lib’ is unspecified)
also installing the dependencies ‘credentials’, ‘curl’, ‘gert’, ‘gh’, ‘xml2’, ‘usethis’, ‘covr’, ‘httr’, ‘roxygen2’, ‘rversions’, ‘devtools’
trying URL 'https://cloud.r-project.org/src/contrib/credentials_1.3.0.tar.gz'
Content type 'application/x-gzip' length 230082 bytes (224 KB)
==================================================
downloaded 224 KB
trying URL 'https://cloud.r-project.org/src/contrib/curl_4.3.tar.gz'
Content type 'application/x-gzip' length 673779 bytes (657 KB)
==================================================
downloaded 657 KB
trying URL 'https://cloud.r-project.org/src/contrib/gert_1.0.2.tar.gz'
Content type 'application/x-gzip' length 61324 bytes (59 KB)
==================================================
downloaded 59 KB
trying URL 'https://cloud.r-project.org/src/contrib/gh_1.2.0.tar.gz'
Content type 'application/x-gzip' length 43909 bytes (42 KB)
==================================================
downloaded 42 KB
trying URL 'https://cloud.r-project.org/src/contrib/xml2_1.3.2.tar.gz'
Content type 'application/x-gzip' length 271876 bytes (265 KB)
==================================================
downloaded 265 KB
trying URL 'https://cloud.r-project.org/src/contrib/usethis_2.0.0.tar.gz'
Content type 'application/x-gzip' length 556740 bytes (543 KB)
==================================================
downloaded 543 KB
trying URL 'https://cloud.r-project.org/src/contrib/covr_3.5.1.tar.gz'
Content type 'application/x-gzip' length 146686 bytes (143 KB)
==================================================
downloaded 143 KB
trying URL 'https://cloud.r-project.org/src/contrib/httr_1.4.2.tar.gz'
Content type 'application/x-gzip' length 159950 bytes (156 KB)
==================================================
downloaded 156 KB
trying URL 'https://cloud.r-project.org/src/contrib/roxygen2_7.1.1.tar.gz'
Content type 'application/x-gzip' length 254118 bytes (248 KB)
==================================================
downloaded 248 KB
trying URL 'https://cloud.r-project.org/src/contrib/rversions_2.0.2.tar.gz'
Content type 'application/x-gzip' length 41558 bytes (40 KB)
==================================================
downloaded 40 KB
trying URL 'https://cloud.r-project.org/src/contrib/devtools_2.3.2.tar.gz'
Content type 'application/x-gzip' length 373387 bytes (364 KB)
==================================================
downloaded 364 KB
trying URL 'https://cloud.r-project.org/src/contrib/fairness_1.2.0.tar.gz'
Content type 'application/x-gzip' length 474580 bytes (463 KB)
==================================================
downloaded 463 KB
* installing *source* package ‘curl’ ...
** package ‘curl’ successfully unpacked and MD5 sums checked
** using staged installation
Package libcurl was not found in the pkg-config search path.
Perhaps you should add the directory containing `libcurl.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libcurl' found
Package libcurl was not found in the pkg-config search path.
Perhaps you should add the directory containing `libcurl.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libcurl' found
Using PKG_CFLAGS=
Using PKG_LIBS=-lcurl
------------------------- ANTICONF ERROR ---------------------------
Configuration failed because libcurl was not found. Try installing:
 * deb: libcurl4-openssl-dev (Debian, Ubuntu, etc)
 * rpm: libcurl-devel (Fedora, CentOS, RHEL)
 * csw: libcurl_dev (Solaris)
If libcurl is already installed, check that 'pkg-config' is in your
PATH and PKG_CONFIG_PATH contains a libcurl.pc file. If pkg-config
is unavailable you can set INCLUDE_DIR and LIB_DIR manually via:
R CMD INSTALL --configure-vars='INCLUDE_DIR=... LIB_DIR=...'
--------------------------------------------------------------------
ERROR: configuration failed for package ‘curl’
* removing ‘/home/mackenzie/R/x86_64-pc-linux-gnu-library/3.6/curl’
Warning in install.packages :
  installation of package ‘curl’ had non-zero exit status
* installing *source* package ‘xml2’ ...
** package ‘xml2’ successfully unpacked and MD5 sums checked
** using staged installation
Package libxml-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `libxml-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libxml-2.0' found
Package libxml-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `libxml-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libxml-2.0' found
Using PKG_CFLAGS=
Using PKG_LIBS=-lxml2
------------------------- ANTICONF ERROR ---------------------------
Configuration failed because libxml-2.0 was not found. Try installing:
 * deb: libxml2-dev (Debian, Ubuntu, etc)
 * rpm: libxml2-devel (Fedora, CentOS, RHEL)
 * csw: libxml2_dev (Solaris)
If libxml-2.0 is already installed, check that 'pkg-config' is in your
PATH and PKG_CONFIG_PATH contains a libxml-2.0.pc file. If pkg-config
is unavailable you can set INCLUDE_DIR and LIB_DIR manually via:
R CMD INSTALL --configure-vars='INCLUDE_DIR=... LIB_DIR=...'
--------------------------------------------------------------------
ERROR: configuration failed for package ‘xml2’
* removing ‘/home/mackenzie/R/x86_64-pc-linux-gnu-library/3.6/xml2’
Warning in install.packages :
  installation of package ‘xml2’ had non-zero exit status
ERROR: dependency ‘curl’ is not available for package ‘credentials’
* removing ‘/home/mackenzie/R/x86_64-pc-linux-gnu-library/3.6/credentials’
Warning in install.packages :
  installation of package ‘credentials’ had non-zero exit status
ERROR: dependency ‘curl’ is not available for package ‘httr’
* removing ‘/home/mackenzie/R/x86_64-pc-linux-gnu-library/3.6/httr’
Warning in install.packages :
  installation of package ‘httr’ had non-zero exit status
ERROR: dependency ‘xml2’ is not available for package ‘roxygen2’
* removing ‘/home/mackenzie/R/x86_64-pc-linux-gnu-library/3.6/roxygen2’
Warning in install.packages :
  installation of package ‘roxygen2’ had non-zero exit status
ERROR: dependencies ‘curl’, ‘xml2’ are not available for package ‘rversions’
* removing ‘/home/mackenzie/R/x86_64-pc-linux-gnu-library/3.6/rversions’
Warning in install.packages :
  installation of package ‘rversions’ had non-zero exit status
ERROR: dependency ‘credentials’ is not available for package ‘gert’
* removing ‘/home/mackenzie/R/x86_64-pc-linux-gnu-library/3.6/gert’
Warning in install.packages :
  installation of package ‘gert’ had non-zero exit status
ERROR: dependency ‘httr’ is not available for package ‘gh’
* removing ‘/home/mackenzie/R/x86_64-pc-linux-gnu-library/3.6/gh’
Warning in install.packages :
  installation of package ‘gh’ had non-zero exit status
ERROR: dependency ‘httr’ is not available for package ‘covr’
* removing ‘/home/mackenzie/R/x86_64-pc-linux-gnu-library/3.6/covr’
Warning in install.packages :
  installation of package ‘covr’ had non-zero exit status
ERROR: dependencies ‘curl’, ‘gert’, ‘gh’ are not available for package ‘usethis’
* removing ‘/home/mackenzie/R/x86_64-pc-linux-gnu-library/3.6/usethis’
Warning in install.packages :
  installation of package ‘usethis’ had non-zero exit status
ERROR: dependencies ‘usethis’, ‘covr’, ‘httr’, ‘roxygen2’, ‘rversions’ are not available for package ‘devtools’
* removing ‘/home/mackenzie/R/x86_64-pc-linux-gnu-library/3.6/devtools’
Warning in install.packages :
  installation of package ‘devtools’ had non-zero exit status
ERROR: dependency ‘devtools’ is not available for package ‘fairness’
* removing ‘/home/mackenzie/R/x86_64-pc-linux-gnu-library/3.6/fairness’
Warning in install.packages :
  installation of package ‘fairness’ had non-zero exit status
The downloaded source packages are in
	‘/tmp/RtmpX0Omiu/downloaded_packages’
> install.packages('libxml2-dev')
Installing package into ‘/home/mackenzie/R/x86_64-pc-linux-gnu-library/3.6’
(as ‘lib’ is unspecified)
Warning in install.packages :
  package ‘libxml2-dev’ is not available (for R version 3.6.3)
> install.packages('libcurl4-openssl-dev')
Installing package into ‘/home/mackenzie/R/x86_64-pc-linux-gnu-library/3.6’
(as ‘lib’ is unspecified)
Warning in install.packages :
  package ‘libcurl4-openssl-dev’ is not available (for R version 3.6.3)